Get the perfect replacement stylus for your Pioneer AT-21, AT-66, or CG-5000 635-D7 with the NOS Walco W-519STD. This stylus is compatible with these models and provides clear and precise audio quality. It is brand new and is sure to enhance your listening experience. The NOS Walco W-519STD is a high-quality stylus that is compatible with Pioneer turntables. It is designed to provide superior audio quality and clarity, making it the perfect replacement for your old stylus. With its excellent performance and compatibility, you can expect nothing but the best from this product. Get your hands on this replacement stylus today and elevate your listening experience!