Square O-Ring Kit – 180 Piece, 18 Sizes, Buna-N (Nitrile) 70 Duro Assortment
Industrial Square Buna-N Duro 70 Kit | 436 Pcs 36-Size (Lathe Cut Washer Rings)
Stone River Products Industrial Square Buna-N Duro 70 Kit – 436 Pieces, 36 Sizes (Lathe Square Cut Washer Rings/O-Rings). Buna-N (NBR) 70 Duro – The Industrial Standard Made from sulfur-cured Buna-N Nitrile, 70 Shore A, black.