SAMCO SPORT XSCH/51(BLUE) 2in Xtreme Coupler Blue Dimensions in Inches (LxWxH): 4.4 x 4.4 x 2.8 SAMCO SPORT XSCH/51(BLUE) 2in Xtreme Coupler Blue. Dimensions in Inches (LxWxH): 4.4 x 4.4 x 2.8