Mouse - Universal - 4 PCS SC20UU 20 mm Aluminum Linear Motion Ball Slide Bearing Slide for CNC Highlights Universal 4 PCS SC20UU 20 mm Aluminum Linear Motion Ball Slide Bearing Slide for CNC 4 PCS SC20UU 20 mm Aluminum Linear Motion Ball Slide Bearing slide rail for CNC Product is shipped based on the main image color or size of the product page. 100% brand new and high quality It is used for linear motion product design.100% brand new and high quality is used for linear motion product design. SC20Uushaft Diameter 20mmcolor As Shown In The Picturematerial Aluminumdimension Approx 50x54x41mm (LWH) included 4 x SC20UU 20mm Aluminum Linear Motion Ball Beling Not Light shooting and different displays may cause the color of the item in the picture a little the real thing. The allowable measurement error is +//13cm.