... LED radiator part, 2.Certificates:ISO9001:2008 & RoHs 3.Material:AL6063 4.Logo can be applied upon request ... Specifications:1. Size: 2 3/8"D*2"H Custom size is availabe2. Material ... process: Stainless steel, steel alloy, aluminium alloy, and etc.3. Process technics: Deburring, Drilling, Die casting,Tapping, Polishing, ... .www.jielimetal.com.cn Aluminum LED Heat Sink JL-CST-006