Hyperglide Mouse Skates for Microsoft Intellimouse Explorer 3.0, Intellimouse Optical 1.1a, 1.1SE, 1.1 and Wheel Mouse Optical 1.1a, 1.1 (MS-3) Replacement mouse feet that increases your control and accuracy by providing the smoothest and most consistent glide Smoother glide helps reduce grip tension which improves accuracy and decreases wrist strain for longer and more enjoyable gaming sessions Exclusive G-Curve Technology produces rounded edges for a scratch-free glide right out-of-the-box; no break-in period required Specially calibrated 0.80 mm thickness: Provides the ideal feet height that eliminates "bottom-scraping" & provides longer life-span Made with 100% virgin grade PTFE material for the lowest friction and eco-friendly, no-residue adhesive. Contains 2 sets.