Hi, my dear. How are you? This is Nina. We are writing to you to establish long-term trade relations with you. Our international standard compliance:ISO9001:2000, ISO14000 and UL. Our Materials : FR-4, HTG FR4, high frequency (Rogers, Teflon, ARLON, TYCONIC), halogen free, different material mixing laminating. Our Various PCBs:FR4,TG,AUL-base,single,double-side and 4--40 multi-layer boards Our Fast delivery time: Double sides:24h 4layers:48h 6/8/10layers:3wd 12/14 layers:4wd Our Payment Terms: PayPal and Bank Transfer Our Credit Limit: All of our old customer can end of month after delivery +30 days If you have any other ideas, please fell free to contact me. We will do much better if you can give any advices to us. Yours faithfully Nina 2018-11-09 chunbi814333428