Thank you for viewing! These are bearings for radio-controlled (RC) models. The size is 1060 with a thickness of 3mm. The size is 1050 with a thickness of 3mm. They were stored with bearing oil applied. There is no gritty feeling, but please understand that these are used items before purchasing. Thank you. *How about these for repairs or spares for those who do off-road or outdoor RC? Please consider them. m(__)m RC Model Bearings 10x6x3 Tamiya Kyosho Yokomo Buggy Off-road Touring F1 Drift Type... RC Model