<h3>Key features</h3><ul> <li>bearing</li> <li>Product Name : Linear Motion Ball Bearing Slide Unit;Ball Bearing Model : LM30UU;Model : SBR30</li> <li>Material : Metal, Rubber;Inner Diameter : 30mm/ 1.18</li> <li>Screw Hole Dia(Each) : 7mm/ 0.28";Hole Spacing : 50 x 50mm/ 1.97" x 1.97"(L*W)</li> <li>Overall Size : 70 x 70 x 55mm/ 2.75" x 2.75" x 2.17"(L*W*H);Main Color : Silver Tone</li> <li>Net Weight : 587g;Package Content : 1 x Linear Motion Ball Bearing Slide Unit</li> </ul><p>Free shipping on orders $50+. 30-day hassle-free returns.</p>