O-Ring Kit - Metric 30 popular sizes totalling 404 orings in 70 shore nitrile - WychBearings.co.uk
O-Ring Sizes - Metric - Complete Gasket Solutions
Amazon.com: KOOTANS 1200Pcs Nitrile Rubber O Ring Kit 24 Sizes O Rings Assortment Kit Set Sealing Washer NBR Metric o-Ring Assortment for Plumbing, Gas, Automotive and Faucet Repair, Resist Oil and Heat