6 PCS 5/8″ Nylon Roller Ball Transfer Bearing Casters 0.625 inches, Silver
Nylon Casters：The roller ball bearing are made of nylon, wear resistant and durable, good mute effect, protect the bottom plate. Capacity：The roller casters with a high load bearing capacity of 22 lbs.
uxcell SCS12UU Linear Ball Bearing Slide Block Units, 12mm Bore Dia
Model: SCS12UU (Bearing No.: LM12UU, Nominal Shaft Diamter (dr): 12mm). Aluminium Alloy Linear Ball Bearing Slide Block Units. Light-weight housing and Chromium Steel bearing ball, good abrasion resistance, high precision and good strength.