Obsidian PRO Air - UHMWPE - Less Noise, More Control, More Durable These Universal Donuts mouse skates, crafted from high-quality 1.0mm UHMWPE ensure a low-friction experience and better control. Added microporous polyurethane foam, make absorbing noise and mouse slide quieter. DIY Tip: Fewer dots provide greater speed. Conversely, more dots slow down. Features: Made with Ultra-High Molecular Weight Polyethylene(UHMWPE). Optimized Thickness. Being 1.0mm skates provide a perfect balance between speed and control. Enhanced Durability. Highly resistant to wear and tear, our mouse skates are built to last. Curved Edges design prevents any scratches, making movement smoother and flick start smoothly. Optimized for Glass. The perfect match for glass pad.