... polish 4.different sizes:150mm*57mm Marine Hardware Stainless Steel Prop 1.Material: stainless steel 316&3042. Quality standard:ISO9001:20003 ... advanced CNC sheet metal processing equipment,scale production equipment, an independent digital sheet metal, CNC punching, welding, grinding, polishing, assembly, CNC ... or drawings. High Quality Marine Hardware /Rigging Hardware SS316 finishing Prop