Features: Make of stainless steel, enduring, rustproof and have a long terms use. By adding weight, easier for player to balance front and rear weights. Exquisites workmanship and quality assurances make the club weight enduring and practical. The pool cue gimbal makes it easier for golfers to balance the front and rear of the club by increasing the weight of the club. The billiard stick weight rings designs make it a great replacement part for your billiard cue, providing a great user experience. Specifications: Materials: stainless steel Diameter: 8g/10g/13g Size: about 2.1x2.1x0.6cm/0.83x0.83x0.234inch Package Includes: 1Pc Billiard Pool Stick Weight Rings note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.