Shop 4’x4’ Knock-out Box – LIDS ONLY 2’x2’ Knock-out Box – LIDS ONLY 30”x30” Knock-out Box – LIDS ONLY 3’x3’ Knock-out Box – LIDS ONLY 24”x30” Knock-out Box – LIDS ONLY 2’x3’ Knock-out Box – LIDS ONLY Knock-out Box – SHIMS ONLY HDPE (High-Density Polyethylene) 20′ RCP (Reinforced Concrete Pipe) 8′ 2’x3’ Knock-out Box – BOX ONLY 24”x30” Knock-out Box – BOX ONLY 4’x4’ Knock-out Box – BOX ONLY 3’x3’ Knock-out Box – BOX ONLY 30”x30” Knock-out Box – BOX ONLY 12”x12” w/ Grate 18”x18” Knock-out Box – BOX ONLY 2’x2’ Knock-out Box – BOX ONLY
