... Material:stainless steel 304,316.austeniteA1,A2,A4 Specification:M6-M24, 16-200mm Grade:45,50,60,70,80 Expansion anchor ... bolt+pipe+flat washer+spring washer+nutsMertirial:1.stainless steel 304,316, austeniteA1,A2,A42.we also have carbon ... steel expansion bolt, and grade:4.8,5.6 ... carton or as per your request. stianless steel expansion anchor bolts