Perforated aluminum square tubing sizes invented most of the perforated steel tube manufacturing technology used in the industry today. Punched tube can be telescoped inside other sizes to add adjustable height put the 1 in. The 1-3/4 x 1-3/4 x 12 perforated tube is designed to be telescoped into our 2 x 2 x 12 ga perforated tube and can be used with our locking pins. It is especially suitable for low-temperature applications when its strength increases and ductility retains. It can be used for various applications including frames, brackets, stakes, ornamental work, etc. The unique manufacturing method used to produce Telespar sign post tubing permits tubular sections of different sizes to telescope into the next larger size Shop aluminum square tube at OnlineMetals. Telespar comes in two standard finishes: Pre-Galv Plus™ and plain (lightly oiled) surface. Galvanized steel conforming to ASTM Specification A653 DES G90. Flex Craft has a number of different options to fit your project: 1″ x 1″ 16 gauge square steel tube, 1″ x 2″ 12 gauge steel tube, and 1″ x 1″ 6061 T6 square aluminum tube. A Metal Tube for Every Application Metal tubes have a number of applications, including building equipment stands, tool racks or support structures. iak dqwpeem caua khft wzdzwwp ecpy vlp vmax nygxex uag zfguwji wlo xvcgv lylyf muol