uxcell 2Pcs Heat Dissipation Aluminum Heatsinks for 1 Phase Solid State Relay Product Name : Solid State Relay Heat Sink;Fit for : Single Phase SSR Material : Aluminum;Mounting Hole Diameter (Approx.) : 3.06mm / 0.12" Hole Spacing : 48mm / 1.88";Base Mounting Hole Spacing : 74mm / 2.91" Total Size (Approx.) : 81 x 49 x 48mm / 3.2" x .9" x 1.9" (L*W*H);Color : Silver Tone Weight : 200g;Package Content : 2 x Solid State Relay Heat Sinks