Product name: aluminum heat sink.
Material: aluminum; Fit for: solid state relay SSR-10A,25A,40A.
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 include: 3x solid state relay heat sink. Note: the solid state relay is not included.