Sealing Washer Flat Neoprene Fits Bolts Sizes #6 Inside Dia 0.120 In Outside Dia 0.250 In Thickness 0.062 In Thickness Tolerance +/-0.016 In Temp. -20 to 170 F Black Durometer Hardness Shore A 50-70 Cushioning Sealing and Vibration Resistant Package 100