Amazon.com: 10Pcs Conical Rubber Washers for Toilet Tank to Bowl Bolts, Jwodo Beveled Gasket Washers for Toilet Tank Leakage Prevent, Universal Fit for 5/16” Toilet Bolts : Tools & Home Improvement
10 Neoprene EPDM Bonded Sealing Washers Stainless Steel 18-8, Neo Bond, 100 Pieces, Works with Both #8 and #10 Screws (#8 & #10) : Amazon.ca: Tools & Home Improvement