Fangrui Product Details Compatibility: This Stylus Is Specifically Designed For The Audio-technica At91 And At91r Cartridges, Ensuring A Seamless Fit And Optimal Performance. The Precision-engineered Design Guarantees That The Stylus Aligns Perfectly With Your Record Player For Flawless Playback. Superior Sound Quality: Equipped With A Diamond Tapered Tip, The Atn91r Stylus Captures Every Nuance Of Your Vinyl Records. It Delivers A Detailed And Vibrant Sound With Minimal Distortion, Allowing You To Experience The Depth And Richness Of Your Favorite Music As Intended By The Artists. Extended Durability: Crafted With A Robust 0.6 Mil Conical Diamond Tip, This Stylus Minimizes Record Wear While Providing Up To 500 Hours Of High-fidelity Playback. The Inclusion Of A High-quality Carbon Fiber Needle Bar And A Protective Cover Further Enhances The Lifespan And Safety Of The Stylus. Effortless Installation: Installing This Stylus Is A Breeze. Simply Insert The Stylus Into Your Cartridge And Gently Adjust Until You