Product Detail:Diameter: 20mmThickness: about 1: White or BlackApplication: use for 1w 3w 5w High Power LED2pin white or 2pin black for unmarried coloration LED4pin white or 6pin white for RGB color LED8pin black for RGBW coloration LEDNotice: 25 Pieces Aluminum Base Plate in a single Board. About Shipping: 1. If your order lower than $5, we will ship through China Post Ordinary Small Packet Plus,it without tracking news in your country. soplease do not open the disputeif you didn'treceived it between 60 days. in case your order greater than $5, we will deliver by approach of China post air mail, orBuydo Standard Shipping, 4. We advise to apply Buydo Standard Shipping, orChina submit air mail,they could be quicker and tracking information Available Everywhere.