This is Yuky from Cinliwell Industrial Co., Ltd. , we get your esteemed company name and address from Alibaba. We-Cinliwell Industrial Co., Ltd.is a professional manufacturer of PCB & PCBA , our products has the advantages of competitive price; prime quality;as well as fast service. Attachment is our PCB pix for your reference. 1. Our PCB specifications are simply as follows:1>PCB layers: single-side, Double-sides, Multi-layers, and Flexible type(up to 24 layers). The capability of our production is over 120,000 square meters per year.2>Surface: Gold platingHALOSPGold finger 3>Max. Board Size: 600mm*700mm4>Copper to Edge-board Spacing: 0.5mm5>Hole side to Edge-board Spacing: 0.3mm Could you pls kindly send us your gerber file for our refrence if you are interested in this product ? or contact with us for more informaiton., we are looking forward to co-operate with your esteemed company to promote our mutual business.Pls contact with us through:cici.wenjin at gmail dot com .