Anvil-Strut channels are manufactured by a series of forming dies, or rolls, which progressively cold work the strip steel into the desired channel configuration. This method produces a cross section of uniform dimensions within a tolerance of +/- 0.015 in on outside dimensions. Invoice Description: AS200 EH-20 PGV W/ELONG HOLES CHANEL 1-5/8IN ELONG.HOLES, 20FT STICK, SOLD BY STICK, PRE-GALVANIZED ANVIL WELDED CHANNEL 25 STICK PER BUNDLE, 500 FT / BUNDLE