1,Made of stainless steel and copper material, which is sturdy constructed, ensure high strength 2,Light and small, inherit flexibility without compromising strength 3,Very strong and easy to use 4,High performance in bass fishing, general freshwater and saltwater, offshore fishing 5,Good for various rigs and leader trace making Description: Our product are made of high quality material and guaranteed by strict inspection and production. For smooth action, rotating without limit and reduce twist to minimum. Useful accessory for outdoor fishing activities. You are worth it. Hope you enjoy your time. Features: 1. Made of stainless steel and copper material, which is sturdy constructed, ensure high strength. 2. Light and small, inherit flexibility without compromising strength. 3. Very strong and easy to use. 4. High performance in bass fishing, general freshwater and saltwater, offshore fishing. 5. Good for various rigs and leader trace making. Specifications: Material: Stainless Steel and Copper Color: Silver Quantity: 20pcs or 40pcs Type Length Tension(kg) Weight(g) 0 14.52mm or 0.57" 4 0.38 1 15.7mm or 0.61" 5 0.44 2 18.7mm or 0.73" 8 0.62 3 19.4mm or 0.76" 10 0.82 4 22.7mm or 0.89" 15 1.37 5 24.6mm or 0.96" 20 1.89 6 29.4mm or 1.15" 25 2.98 7 30.5mm or 1.20" 30 4.25 8 33.6mm or 1.32" 35 6.45 Package Included: 20pcs or 40pcs swivel solid rings (type and quantity as you choose)