Ansen Tools AN-313 Copper Washer Assortment, 110-Piece The kit contains 30-Piece 1/4-Inch, 25-Piece 5/16-Inch, 20-Piece 3/8-Inch, 15-Piece 7/16-Inch and 10-Piece 1/2-Inch Soft copper compresses for a tight fit All washers set in easy to use SAE sizes Washers come in convenient storage case Quality guarantee