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139'' (1/8" Nominal) Buna-N O-Ring Cord Stock, 70A Durometer, 0.139" Thickness, 10' Piece, Black: Amazon.com: Industrial & Scientific
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039'' (1 mm) Buna-N O-Ring Cord Stock, 70A Durometer, 0.039" Thickness, 10' Piece, Black: Amazon.com: Industrial & Scientific
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099 (2.5mm) Square Fluorocarbon FKM/Viton 75 O-Ring Cord Stock, Bulk, Black [SV75.099] : The O-Ring Store LLC, We make getting O-Rings easy!
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139IN (3.53 MM) CS, Silicone 70 Durometer Square O-Ring Cord Stock, 10 FEET: Amazon.com: Industrial & Scientific
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