<h3>Key features</h3><ul> <li>bearing</li> <li>Product Name : Linear Motion Ball Slide Bearing;Model : SC20UU</li> <li>Material : Metal, Rubber;Inner Diameter : 20mm/ 0.79</li> <li>Screw Hole Dia(Each) : 5mm/ 0.2";Overall Size : 50 x 55 x 40mm/ 2" x 2.2" x 1.6"(L*W*H)</li> <li>Main Color : Silver Tone;Net Weight : 238g</li> <li>Package Content : 1 x Linear Motion Ball Slide Bearing</li> </ul><p>bearing20mm Inner Diameter 50mm Length Linear Motion Ball Bearing SC20UU</p><p>Free shipping on orders $50+. 30-day hassle-free returns.</p>