[Premium Quality]: the strap loop is made of high quality silicone rubber with good elasticity. The metal ring is longer than others, thus can hold tighter on your glasses. Flexible and durable. [Quality Materials]: Eyeglass chain ends are made of high-quality silicone and stainless steel, soft and durable, anti-oxidation will not rust, can be close to the skin, providing you with a perfect use experience. Silicon Dry Clean Only Vintage SUA1008-FBA [Perfect Size]: Adjustable rubber ends connectors is about 20 mm long and 5 mm wide, is a universal size, suitable for most eyeglass chains. [Adjustable and Comfortable]: The wearer can move the metal coil to adjust the grip of their glasses, sliding up to lock, sliding down to unlock, providing you with a comfortable experience. [Widely Applications]: Eyeglass chain strap ends are suitable for any craft project that requires a fixed ring. It is a necessary accessory for various glasses, such as sunglasses chains, sports glasses belts, etc., providing you with many convenien