Home Telescopic Tubing Pre-Drilled Telescopic Tubing Pre-Drilled Telescoping Square Tubing – .06″ Alum. Pre-Drilled Telescoping Square Tubing - .06" Wall Products .75″ x .06″ 6005AT6 Alum Telescoping Square Tube (Pre-Drilled) $27.34 – $40.10 Select options .884″ x .06″ 6005AT6 Alum Telescoping Square Tube (Pre-Drilled) $34.63 – $41.92 Select options 1.018″ x .06″ 6005AT6 Alum Telescoping Square Tube (Pre-Drilled) $38.27 – $43.74 Select options 1.156″ x .06″ 6005AT6 Alum Telescoping Square Tube (Pre-Drilled) $23.00 – $26.00 Select options