Made of premium plastic material, can be shortened to adjust size reduction. If you have joint problems, and experience swelling from time to time, ring adjusters are a great way to keep your rings secure without irritating your joints. Feature - Color: Transparent. - Material: Plastic. - Size: About 10.00X0.50X0.50cm/3.93X0.20X0.20in. -Type: Thin round wire: 3.5mm; thin flat wire: 4mm; thick flat wire: 4.8mm; thick round wire: 5mm; Each size comes in 4pcs. - Innovative, spiral-based design provides a and snug fit for most rings - It can wrap easily around the back of any ring band. The best a friend. - Eco-friendly material, safe to use on skin. Virtually Invisible on the rings! - Easy to clean, can be easily wiped off to , oil, prevents water-retention and contaminant build-up. - It is hardly see the ring size adjuster after you put on the it, Make your ring a perfect show. Package list: 16 Spring Ropes