<h3>Key features</h3><ul> <li>Type: LM20UU; Equipment Type: Roller</li> <li>Material: Ball Bearing Steel</li> <li>Shaft ID: 20mm; Shaft OD: 32mm</li> <li>Dimension: 20 x 32 x 42 mm</li> <li>Quantity: 4pcs</li> </ul><p>4pcs LM20UU 20 x 32 x 42 mm 20mm CNC Linear Ball Bearing Linear Bearing Bushing</p><p>Free shipping included. 30-day hassle-free returns.</p>