Wheels Manufacturing SB-6903 Sealed Bearings - Pack of 2
F
High carbon chromium steel alloy races
Riveted steel bearing retainers for toughnesss
Kyodo Yushi SRL grease or equivalent
S
ABEC-3 - High-precision Grade 10 chromium steel balls (ground to 10/1,000,0000' round)
2RS - Double contact Seals
17x30x7mm