Connector Fitting Series 6000 For Raceway Height 3 1/2 in For Raceway Width 4 3/4 in For Raceway Width x Height 4 3/4 in x 3 9/16 in Material Steel Color Gray Mounting Style Screw On Backing - Compatible with Product Type 6000 Raceways Features Has 1-1/4 in 1-1/2 in and 2 in Trade Size Knockouts in Back and on Each Side Includes 1 1/2 in Trade Size Knockout 1 1/4 in Trade Size Knockout 2 in Trade Size Knockout Connector Overall Height 2 1/2 in Overall Length 12 in