uxcell 37mm DC Geared Motor Mounting Bracket Holder w 6mm Hex Coupling Product Name : DC GearedMotor Bracket wHex Coupler;Fit Modelfor : 37mmGearedMotor;BracketSize : 47 x 40 x 3mm/1.9" x 1.6" x 0.12"(L*W*T) Big Hole Size : 26 x 13mm/1" x 0.5" (L*W);Small Hole Dia. : 3mm/0.12",3.5mm/0.14";Hex Coupler Size : 18 x 12mm/0.7" x 0.47" (L*Max.W) Coupler Fit Motor Shaft Diameter : 6mm/0.24";Hex Hole Diameter : 4mm/0.16";Screw Fixed Hole Diameter : 3mm/0.12" Material : Alumimum, Copper;Color : Black, Gold Tone Weight : 35g;Package Content : 1 x DC GearedMotor Bracket1 xDC Geared Motor Hex Coupler