... :lost wax process 3)satin or mirror polish stainless steel end capsSpecification1, investment casting ,precision casting2, carbon steel / alloy steel /stainless ... high witness3) Flush grind6, Heat treatmentHeat treat are used to control hardness ,mechanical properties ,corrosion resistance ,and surface treatment .unless otherwise ... /2 .47 1.89 2.59 1,500 stainless steel end caps of handrail fitting