The WR2-C ABS Wire Retainer for 2" Wiring Duct can be inserted between the fingers of type G and H wiring ducts to contain wiring when the cover is removed. Adjustable height. For 2" (50.8 mm) wide wiring duct that has a height of 2" – 4" (50.8 mm – 101.6 mm) Color Black. 100 per package.