<h3>Key features</h3><ul> <li>LM Series Rubber Sealed Linear Ball Bushings: Manufactured with rubber seals these linear ball bushings are characterised by their smooth movement, high rigidity and low friction, they are easy to maintain or replace and have a good life span in service. They consist of steel outer housings with sets of balls running around their own tracks within the low friction polyamide / steel inner raceways. The UU series has the benefit of rubber seals to prevent the ingress of dust and moisture.</li> <li>Benefits: Low friction, low maintenance, rubber seal limits moisture and dirt ingress, cost effective solution</li> <li>Material: bearing steel, nylon</li> <li>Inner Diameter: 12mm; Outer Diameter: 21mm; Total Length: 30mm</li> </ul><p>Description:LM Series Rubber Sealed Linear Ball Bushings: Manufactured with rubber seals these linear ball bushings are characterised by their smooth movement, high rigidity and low friction, they are easy to maintain or replace and have a good life span in service. They consist of steel outer housings with sets of balls running around their own tracks within the low friction polyamide / steel inner raceways. The UU series has the benefit of rubber seals to prevent the ingress of dust and moisture.Benefits: Low friction, low maintenance, rubber seal limits moisture and dirt ingress, cost effective solutionSpecification:Product Name: OPEN Linear Motion Bushing Ball BearingModel: LM12UU-OPMaterial: bearing steel, nylonInner Diameter: 12mmOuter Diameter: 21mmTotal Length: 30mmMain Color: Silver TonePackage Including:LM12UU-OP Precision OPEN Linear Motion Bushing Ball Bearing 12*21*30mm x 2Pcs</p><p>Free shipping on orders $50+. 30-day hassle-free returns.</p>