Outer Diameter:70mm Inner Diameter: 29mm Height: 35mm Material: Aluminum Application: UseFor7W 9W 12W 15W 18WLED PCB cooling working temperature Package Include: 10pcs12W LED Heat sink Notice: kit now not consist of the 12w led pcb. if you'd like it, click on this link to buy: This Heat Sink can swimsuit for our product: 220V12W LED PCB. in order for you it, click on this link to buy: