Home Telescopic Tubing 6061-T6 Heavy Wall Telescopic Square Tubing 6061-T6 Heavy Wall Telescoping Square Tube 6061-T6 is a very strong, structural grade aluminum ideal for heavy-duty applications. Our 3.35″ and 4″ telescoping square tube sizes are good materials for lifting and moving heavier objects that may be too large for our other telescoping sizes. Products 3.43″ x .25″ Heavy Wall 6061T6 Alum Telescoping Square Tube $25.00 – $179.00 Select options 4.00″ x .25″ Wall 6061T6 Alum Telescoping Square Tube $56.00 – $219.00 Select options