Hyperglide Mouse Skates for Logitech G9x and G9 (G-9) 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 thickness of 1.05 mm for the main body feet and 0.95 mm for the wide-grip attachment feet: Provides the ideal feet height that eliminates "bottom-scraping" & longer life-span Made with 100% virgin grade PTFE material for the lowest friction and eco-friendly, no-residue adhesive. Contains 2 sets.