Nexify Quick Release Seat Post Clamp with Bike Chainstay Protector - Aluminum Seatpost Collar for Mountain Biking, Cycling, Track Riding QUICK RELEASE COMPATIBILITY  Clamp it on your standard seatpost for quick and easy adjustments and an ultra-strong hold that never slips or slides. IMPROVED DURABILITY  Made with anodized aluminum alloy, Nexify post clamps are made to last through even the toughest on and off road riding trips. VERSATILE DEPENDABILITY  Precision cut for reliability and lightweight functionality, it works effortlessly with standard bike saddles. SLEEK, SIMPLE, EASY  Coming in three different colorsblack, gray, and redour bicycle post clamps can be used on a wide variety of bike styles. WORKS WITH FRICTION PASTE  Use Nexify post clamps with friction paste and proper pre-tension and itll maintain the tightest hold to fit your frame.