Features: 50pcs rings in a pack. Made from PVC material, lightweight and durable. Great components for fly, spinning and casting fishing rods. Specifications: Material: PVC rubber Inner Diameter: 8.5mm/9.5mm/11mm/13mm/15mm/17mm/19mm/21mm (optional) Quantity: 50pcs Package Weight: 10g - 20g / 0.3oz - 0.7oz Package List: 50 * Fishing Rod Winding Check Ring