... Copper Power Filter 1.1-100 microns 2.Stainless steel,Copper, titanium 3.OEM,Non-standard 4.mesh powder sintered Sintering Copper Power ... exhaust throttle BESLD, copper / stainless steel sintered ( filter, cartridge, filter tube, filter, filter), porous sintered filter material.HENGKO Filter adopt stainless steel powder, bronze powder or ...