2PCS Aluminum Heatsink Radiator 37x37x24MM Heat Sink Cooling For LED Chip Cooler Radiator Heat Sink Feature: one hundred pc brand new by no means used Material: Aluminum Colour: Black Dimensions: 37mm/1(L) x 37mm/1(W) x 24mm/0(H) Number of blades: 9 items Used for: diversified small DC converter circuit boards, LEDs, strength ICs and transistors, etc. Package Included 2*Aluminum warmth sink for LED and kit IC transistor module PBC