Cylinder casting is constructed from high-quality cast iron or aluminum for long-lasting durability Product Features:All rubber parts are of high-quality EPDM compound for resistance to DOT3 or DOT4 brake fluidKey components like spring are from high and stable quality suppliers.Products are machined by CNC machines with strictly quality control.Parts assembled in a clean environment and all parts were thoroughly cleaned before assembly.Direct replacement for a proper fitManufactured to strict engineering quality standards, meets S.A.E. specificationsEach product is 100% tested on production lines and sampling tested prior to shipmentKey working procedure used CNC, positioning accuracy 0.005/300 mm, repeat positioning accuracy + /-0.008 mmMain cylinder hole of measured by the 0.004 mm distinguish precision pneumatic instruments, surface roughness instrument and endoscope testing
