This is the pack of ten 8x16x5mm Select NMB Metal Shielded Bearing Set from Ultimate Racing.
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.
The approximate size of the packed product or the sales package is 18 x 18 x 5 mm.