ITEM NAME:3Piece Radiator Aluminium Heat Sink Cooling Module For Solid State Relay Description: - Product name: aluminum heat sink. - Material: aluminum - Size:80*50*50mm - Fit for: solid state relay SSR-10DA - Heat sink provides long lasting usage, it will help dissipate the heat and protect your relay. - Easy installation: need to be evenly coated with thermal grease between the solid state relay and the heat sink. Package Included: 3Pcs Relay Heat Sink Note: the solid state relay is not included..Heat sink provides long lasting usage, it will help dissipate the heat and protect your relay. - Easy installation: need to be evenly coated with thermal grease between the solid state relay and the heat sink.