8x16x5 Ultimate Select NMB Metal Shielded Ball Bearing - UR7802.

• They are manufactured by the prestigious Japanese brand NMB.
• The ball cage is made of metal for extra durability.
• The balls are large to prevent them from clogging easily with dust.
• Made of high-quality steel to prevent the track and balls from scratching or pitting easily. This way, just by cleaning the bearing, it will spin smooth as new again.