- 2 inch perforated square tubing. Perforated Square Tube is designed to meet NCHRP 350 breakaway standards. Material is sold in full 24' lengths but can be cut to 6' or 8' lengths. 7/16” Diameter holes on 1” hole centers. 12 gauge (. 00". We are a small, family owned metals supplier with great pricing and customer service. Perforated tube has 7/16" diameter holes on 1" centers on all four sides of the tube. Telespar comes in two standard finishes: Pre-Galv Plus™ and plain (lightly oiled) surface. Amazon. , one piece of 1-1/2" x 1-1/2" and one section of 1-3/4" x 1-3/4"). 1i h9lerbd 4p vh91vn cec eoiw xuo 9i bbslm efkdjhqw
