Amazon.com: Letool 4pcs U type groove pulley nylon Guide Pulley Rolling Bearing U Groove Roller Wheel 8x40x20mm for Driving Mechanical Equipment, or Used in Doors and Windows : Industrial & Scientific
Monobloc wheel - U series - HAMILTON CASTER - inox / wheel / grooved
Sliding grooved nylon roller diameter 60mm,thickness 48mm,U-groove diameter 50mm,gate nylon wheel with double 6201RS bearings. - Price history & Review | AliExpress Seller - Rongroller Store | Alitools.io
U GROOVE GUIDE ROLLERS (DOUBLE BEARINGS) | IMAO
5PCS Deep U Groove Round Bottom Bearing Track Roller Wheel Stainless Steel Guide Pulley Rail Ball Rolling Bearing 8x22.5x14.5mm: Amazon.com: Industrial & Scientific
U-Grooved Wheels: Capacity: 600 - 16,000 lbs. Hamilton Caster
Lber 2 Inch Roller Wheel Bearings U Groove Pulley Wheels Detachable Heavy Duty Grooved Wheel For Material Handling And Moving - Lifting Pulley Blocks - AliExpress
LFR5201-10KDD 12mm ID x 10mm U Groove Track Roller Bearing – VXB Ball Bearings