Brass Ball Cage Bearing | Inner Dia 20 mm | Thickness 4 mm | Length 60
Common Ball Bearing Cages: J, W, RJ and TW Types - BEARING NEWS
BaseHit Real Ball Pitching Machine & 30' Xtender
LM20GA Linear Ball Bearings 20mm Bore 32mm OD 42mm Length Steel Cage for CNC Machine 3D Printer 2pcs Power Transmission, Bearings & V-Belts - Newegg.com