Description: Material: solid zinc alloy Features: seamless smooth, bright and no rusty. Excellent for quick connect/disconnect belt & bag straps and more Can be used in various applications,sports equipment,pet products and so on Great for the use of collars,belts,backpacks, luggage Specification: Inner Diameter: 2.5cm / 0.98inch Package Includes: 10 x O Rings Note: Please read and compare the size above for a better fit before you purchase. As the size above is hand-measured, please allow 1-3cm measurement errors. Due to the light effects and monitor ’s brightness, contrast settings etc., there may be a slight color difference between the pictures and the actual item