MR6705-2RS Ball Bearing ID 25mm OD 32mm Width 4mm - Double Sealed 1in It tells you how round

It tells you how round and smooth the balls are

Dimensions (Inches) d L A J N A1 A2 A0 B S 2-3/4" 8-29/32" 2-13/32" 7-1/64" 63/64" 31/32" 1-27/64" 3-3/16" 3-5/64" 1-19/64"

and they come pre-lubricated with grease so they’re ready to ride

Looking for tight

Standard seal is R-Seal

MR6705-2RS Ball Bearing ID 25mm OD 32mm Width 4mm - Double Sealed 1in It tells you how roundMR6705 2RS Deep Groove Ball Bearing Ultra Slim 25 x 32 x 4mm Double Sealed The MR6705 2RS is a slim profile deep groove radial bearing designed for light duty, high precision setups. Sealed on both sides, it keeps out debris while maintaining smooth performance in tight fitting assemblies. Pack size: 1 bearing Inner diameter: 25mm (0. 984") Outer diameter: 32mm (1. 26") Width: 4mm (0. 157") Type: Single row deep groove radial bearing Closures: 2RS