Small spring 1.Size:M4-M48 2.Steel,Stainless steel,Alloy steel 3.Custom made 4.ISO factory Small ... spring 1. Standard of Small spring : ISO,JIS,GB,ANSI,BSW ... : Steel,Stainless steel,Alloy steel 3. Dimension of Small spring : M4-M484. OEM&Customize non-standard products welcome ... ACCORDING TO YOUR DRAWINGS----------------------------Various slot Small spring