URBEST Black Aluminum Heat Sink Heatsink Three Phase Solid State Relay Product Name : Solid State Relay Heat Sink;Material : Aluminum Mounting Thread Hole Diameter : 3.5mm / 0.138";Mounting Hole Distance : 94 x 48mm / 3.7" x 1.9"(L*W) Overall Size(Approx.) : 150 x 88 x 35mm / 5.9" x 3.5" x 1.4" (L*W*T);Color : Black Weight : 371g Package Content : 1 x Solid State Relay Heat Sink