Outer Diameter:41mm Inner Diameter: 26mm Height:15mm Material: Aluminum Application: UseFor3W 5W 7W LED PCB cooling operating temperature Package Include: 10pcs 5W LED Radiator Notice: equipment no longer include the 5w led pcb. if you need it, click this link to buy: This Heat Sink can swimsuit for our product: 220V5W LED PCB. if you want it, click on this link to buy: