... quality & Competitive price 4Good after sales service Driver PCB board for air condition compressor(OEM PCBA):Material:FR-4Layer: 4 layers Surface ... HAL, Gold plating, Chemical silver, etc.The other solder mask type we could do are: Red, yellow, white, black, purpleProcessing: ... (5 more days for trial order) Production line: Driver board for air condition compressor, a/c clutch compressor(OEM PCBA)