For use on 1970-1972 Small Block engines with aluminum water pump. Can be used on both A/C and non-A/C applications. Includes (3) OE correct 5/16-18 place bolts to attach the brackets to the pump and the bolt, conical washer, and spacer used to sandwich the brackets to the pump body. Extra washer provided for use on water pump housing bolt in adjusting slot. Powder coated low gloss black for better appearance and longer life. Will NOT fit TRW/Thompson pumps.