Features: - Universal Fit: Works with all PTL instruments, so you don’t have to worry about compatibility. - Leak-Free: Helps prevent leaks, ensuring your instruments perform as they should. - Durable: Made from tough, high-quality rubber that can handle regular use. - Easy to Replace: Quick and hassle-free replacement with no special tools needed. - Pack of 5: You get 5 rings, giving you spares for when you need them. Specifications: - Compatibility: All PTL instruments. - Material: Durable rubber. - Pack Size: 5 O-rings. - Purpose: Leak prevention and smooth instrument performance.