I want Drain valve (Part No. 934 300 003 0 M22*1.5 sw=27mm). We want copper drain valve, but, Only spring is the stain steel. I want 10000pcs. I want Material of spring drain valve is (Stainless steel) X12CrNi17 (Din 17224) C Cr Ni 0.12% 17% 8% Do all the parts are similar in photo attach file. Please send me price of pcs. Thanks!