Product name: for U6000 DUB dental disc self unloading screw cover Size: Outer diameter 27MM Thread diameter 22MM Height 6MM Product Description: This is a high-quality screw cover made of aluminum alloy, very light, only 4.5 grams. Through this screw cover, you can convert your for U6000 dental disc into a self unloading dental disc, making it easy to disassemble your dental disc. Color: Gold Material: aluminum alloy Package Contents: 1 x Bicycle Crank Arm Bolt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.