MATNIKS Nitrile Rubber Sheet (NBR) Heavy Duty, Oil Resistant, Hardness Shore A60 Black Smooth, 12x12-Inch 1/16" W (+/- 5%) for Plumbing, Gaskets DIY Material,Supports, Leveling, Sealing, Protection - - Amazon.com
NICKSTON 20pcs Multi Purpose NBR70 Rubber Replacement O-Rings Gaskets Washers Seals Set for Home, Outdoor, Automotive, and Plumbing (1.78mm ID x 1.78mm CS (1/16" ID x 1/16" CS)): Amazon.com: Industrial & Scientific
Amazon.com: uxcell Nitrile Rubber O-Rings 20mm OD 15mm ID 2.5mm Width, Metric Nitrile Rubber Sealing Gasket, Pack of 25 : Industrial & Scientific
NICKSTON 20pcs Multi Purpose NBR70 Rubber Replacement O-Rings Gaskets Washers Seals Set for Home, Outdoor, Automotive, and Plumbing (1.78mm ID x 1.78mm CS (1/16" ID x 1/16" CS)): Amazon.com: Industrial & Scientific
Amazon.com: BUSY-CORNER 495 Pieces SAE Metric O Ring Kit with O-Ring Pick & Installation Tools Rubber Washer Orings for A/C Professional Plumbing Automotive(Green Green) : Automotive