1″ On-Side Fiberglass Square Hollow Tube


Pultruded Fiberglass Square Hollow Tube

Nominal Dimensions
Outer On-side: 1″
Inner On-Side: 0.75″
Wall Thickness: 0.125″
Weight per Linear Foot: 0.32 lbs / 145.15 g
Color: Light Olive Green

Length: Choose the length of the tube

SKU: ST-1LOG-18-S Categories: , , Tag:

1″ On-Side, Fiberglass Square Hollow Tube, Light Olive Green

Our 1″ Square fiberglass tube is made by the pultrusion process. Fiberglass unidirectional roving (for maximum strength) with a veil mat, pulled via hydraulics through a bath of resin and pigment. Heated and cured. Our stock lengths are the perfect sizes to ship via standard parcel carriers like FedEx and Post. 8 foot long lengths fit under the oversize 3 shipping mark. Oversize 3 goods (anything over 96.02 inches) will all ship at freight rates which start at $120 and rise from there making our lengths of tube perfect for prototyping, hobbyist, etc…

This listing contains all of the product offerings for the 1″ On-Side, Square Hollow Tube including: ST-1-05, ST-1-2, ST-1-4, ST-1-8, ST-1LOG-18-S-05, ST-1LOG-18-S-2, ST-1LOG-18-S-4, and ST-1LOG-18-S-8

Square Tube Typical Properties

Square Tube Properties

MGS Fiberglass Sizes that sleeve 1″ On-Side Square Hollow Tube:

ST-1 1 inch On-Side Square Tube sleeving RSR-34 0.75 inch OD Round Solid Rod Diagram 800x800 - Max-Gain Systems, Inc.

3/4 inch OD Round Solid Rod fits inside our 1 inch On-Side Square Hollow Tube (full length sleevable)

ST-1 1 inch On-Side Square Tube sleeving RT-34 0.75 inch OD Round Tube Diagram 800x800 - Max-Gain Systems, Inc.

3/4 inch OD Round Hollow Tube fits inside our 1 inch On-Side Square Hollow Tube (full length sleevable)

ST-1 1 inch On-Side Square Tube sleeves inside ST-125 1.25 inch OD On-Side Square Tube ONLY 6 to 12 inches Diagram 800x800 - Max-Gain Systems, Inc.

1.25 inch On-Side Square Hollow Tube fits over our 1 inch On-Side Square Hollow Tube (TIGHT FIT – Only sleeves 6 to 12 inches)

Attachments that fit-on, fit-in, clamp-on, couple, etc…

316-IB-K 800x800 Stainless Steel I-Bolt Kit - Max-Gain Systems, Inc.

All 316 Stainless Steel I-Bolt kit designed to perfectly go through our 1 inch On-Side Square Hollow Tube

Square Vinyl End Caps 800x800 - Max-Gain Systems Inc
The 1 inch Vinyl End Cap fits on the end of the 1 inch On-Side Square Tube.

Square Tube Sleeving and Reinforcement

Sleeving and Reinforcement Guide Square Tube and 3D

Square Tube Sample Pack
ST-SPL 250x250 Square Tube Sample Pack - Max-Gain Systems, Inc.

This Square Tube is available in a Square Tube Sample Pack for easier product evaluation. Easily acquire a 6 inch or 2 foot long piece of each size of Square Fiberglass Tube.

Note: Our square tube to square tube sleeving combinations, while perfect for reinforcement or extension applications, will be too snug for full-length slip-fit applications, such as push-up masts. Our square tube will only sleeve 6-12 inches. The square tube to round tube mating combinations will yield less strength at the joint (due to only 4 point contact) than either round-to-round or square-to-square combinations.

Square Tube
Tubing Size
Accepted Inside Sizes
Accepted Outside Sizes
1.25″ on-side X 1/8″ wall square tube (snug fit)
1.5″ on-side X 1/8″ wall square tube (snug fit)
1.75″ on-side X 1/8″ wall square tube (snug fit)
2″ on-side X 1/4″ wall square tube (snug fit)
2″ on-side X 1/8″ wall square tube (snug fit)
No direct available sizes
No direct available sizes

Fiberglass Information and Resources


Fiberglass Joining 250x250 - Max-Gain Systems, Inc.

Joining and connecting tubes and rods together through many different methods. Find out which method works for you!


FG Circular Saw Raw 250x250 - Max-Gain Systems, Inc.

Information on cutting and drilling fiberglass tube and rods. Including which tools work best!


Bonding & Adhesives 250x250 - Max-Gain Systems, Inc.

Information on bonding fiberglass shapes together thru chemical adhesion. Including what NOT to use!


Painting Fiberglass with Rustoleum Spray 250x250 - Max-Gain Systems, Inc.

Information on painting fiberglass tube and rods. Best practices and tips on how to make it less visible.


Fiberglass Quad Spreaders and other sleeved fiberglass 250x250 - Max-Gain Systems, Inc.

We offer telescoping, Quad Spreaders with usable lengths up to a total of 26 feet! Telescoping Quad Spreaders are discounted from individual piece prices! See our Quad Spreader Information Sheet for details.


Quantity discounts on fiberglass preformed shapes 250x250 - Max-Gain Systems, Inc.

Buying ten or more quantity of one size of fiberglass qualifies for a 10% quantity discount on that item. Fifty or more, of one size, qualifies for 15%, and one hundred or more 20%.


Manufacturing pultruded fiberglass tube and rod 250x250 - Max-Gain Systems, Inc.

If you are a reseller or manufacturer, you may qualify for our factory-direct, wholesale/O.E.M. pricing! SUBSTANTIAL savings are possible with increasing volume, and our customer service is unsurpassed. Email us for quantity pricing.


Drilling3 grayscale 250x250 - Max-Gain Systems, Inc.

Available free by telephone. For almost unlimited life, we highly recommend that any fiberglass – even ours which is UV-stabilized – be painted. A sprayed primer coat and flat-black top coat, works best. (See our Max-Tips Info Sheet for details.)

About Max-Gain Systems, Inc.

Max-Gain Systems, Inc. carries a full line of in-series, between series, right angle, T-shaped, quick connect, handie-talkie (BLACK), pigtails (coaxial jumpers), etc… RF adapters. Our RF adapter lines are constantly expanding. We keep our RF connector and adapter lines in stock. We ship both retail and wholesale quantities. To become a dealer / wholesale user, contact us with your potential usage.

Max-Gain Systems, Inc. is the number one supplier of fiberglass round hollow tube, square tube and round solid rod to the antenna manufacturing industry. We produce millions of feet a year for hundreds of different industries. Including but not limited to:  marine / boating, aeronautical, agriculture, construction, emergency services, etc….  We have the unique ability to sell one piece or even a semi-truck full. Feel free to prototype using our fiberglass tube and rod then contact us for a quote on a production run. At production run quantities we can cut to your desired lengths at no additional charge. We can also perform several different fabrications (example: drilling holes in precise locations along a tube) to ensure your delivered material is ready for assembly. We have several accessory items designed for our fiberglass including but not limited to: couplers, telescoping clamps, ferrules, etc…

ST-1-8, ST-1-4, ST-1-2, ST-1-05, ST-1LOG-18-S-8, ST-1LOG-18-S-4, ST-1LOG-18-S-2, & ST-1LOG-18-S-05

Additional information

Shipping Weight N/A
Shipping Dimensions N/A
Width of Side


Weight per Linear Foot (lb/ft)


Wall Thickness

1/8" Wall


6 in, 23.25 in, 46.5 in, 93 in


Lt. Olive Green


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