Profile: Shanghai Sintermatic Co.,Ltd produces filter elements, bronze mufflers, sintered copper pipes and aux turn parts. We are an ISO 9001:2000 certified company. Our products include exhaust mufflers, speed control mufflers, filters, disc filters and V type filters. A heat pipe is a simple device that can quickly transfer heat from one point to another. Silencers are made of sintered bronze sintered together with a solid brass hexagon.