【Spill-Proof Cup Holder】Our cup holder is with a diameter of 3.95 inch.securely holds all your favourite drinks - hot or cold - on any table surface, eliminating the possibility of ever spilling a drink again. 【High Quality Materials】The cup clamp is made of metal material with soft material silicone pad,it won't scratch the mounting surface, better protection for your furniture. Suitable for table thickness 0.3'' - 2''. 【COMPATIBILITY】:The under table cup can be installed on anywhere, table, gaming desk, cupboard and wheelchair. It can work perfectly with most popular brands bottles of 18-40 oz. 【Easy to Install】 Simply tighten the black knob downward by hand instead of drilling a hole or paste with glue to the underside of your desk, so leave no damage to your desk.Snap the cup holder into the buckle， now you can place your cup. 【U-shaped groove design】The cup holder has U-shaped slots for excellent placement of cups with handles.Perfect for Office, Home and Gaming. Body color: black Product size: 6.02x3.74x2.36in Weight: about 170g Product packaging size: 10.5*10.5*6.5cm Total load capacity: 5kg Material: Aluminum alloy + plastic Shipping form: finished product Warranty period: 12 months from the date of purchase Country of origin: China various positions to orient the cup opening so you can pick up your cup in the most comfortable position for you