... 4. ISO9001:2000 Specifications:1. Product Name: Bras Valve Core, Valve Cartridge2. Raw Material: Brass 58-3A, C37700, lead ... : ISO9001:2000.7. 10 years OEM experienceChangshan Hongfeng Tubing Co., Ltd. (HT for short), established in 2003, is a ... water pipes, air conditioner, refrigerator, fire valve, gardening, high-level hygienic equipment and different kinds of industrial copper pipe fittings, ...