Allstar Straight -4 AN Male to 10mm-1. 50 in Male Crush Washer Included Brake Line Adapter Fitting (Pack of 10) is made from race proven quality materials. It adapts a -4an male to 10 millimeter-1. 50 male and has a straight style fitting. A crush washer is included. It is sold in one set of 10 pieces. Allstar also carries a large and wide selection of quality fittings for most automotive plumbing needs. It is backed by a 90-day limited factory .