1.ISO9001:2008 2.Made by CNC machine 3.Good resistance to high and low temperatures 4.part name:compression springs Specification 1) Many kinds available 2) Main material: 60Si2MnA, 177PH, X750,X718,65Mn,50CrV4 3)part name: 177PH valve springs Terms and conditions Sample lead time:3-7days Production lead time:15-30days Payment term: 30% prepaid before production, Shipping term: FOB, CIF or other ...