YIXISI 225PCS 15 Sizes Black O-Rings Assortment Kit, Nitrile Rubber Metric O-Rings, for Tap Plumbing Washer Seal & Auto Quick Repair

These seem they are good quality yet to use these under proper wear and tear conditions. The size and diameter, thickness seems to be of good standard. These were presented well in a case to keep them secure and organised, at least I can label these and top them up with those sold in plastic bags.Will try and write a review after some more testing.

Good selection of sizes ideal for the workshop