Coupling, Series 3000, For Raceway Height 1 1/2 in, For Raceway Width 2 3/4 in, For Raceway Width x Height 2 3/4 in x 1 15/32 in, Material Steel, Color Gray, Number of Channels 1, Mounting Style Screw On, Backing -, Compatible with Product Type 3000 Raceways, Includes (1) Coupling, Overall Height 2 1/4 in, Overall Length 2 1/4 in, Overall Width 2 1/4 in, Standards , cULus, UL Listed, UL5