The copper PCB has a diameter of 16mm/20mm, it is useable in a wide range of applications like LED torches.
20mm Copper Star Design Updated as Below :
Why use Copper PCB not Aluminium PCB
Copper PCB is design for reduce LED junction temperature that allowing users to increase LED life, reliability, brightness.
Quantity : 1PC
Copper PCB FOR CREE XM-L or XM-L2
Specification: Single-Sided Board (SSB)
Board thickness: 1.7mm
Dimension: 16mm Round / 20mm Star
Solder mask color: White
Surface finish: HASL Lead Free