[Premium Quality]: Crafted from high-quality silicone with excellent elasticity. The metal ring is longer than others, ensuring a secure grip on your glasses. Flexible and durable for long-lasting use. [Quality Material]: These eyeglass chain ends are made from premium silicone and stainless steel. Soft and durable, resisting oxidation and rust. Gentle on the skin for a comfortable wearing experience. Silicone construction. [Perfect Size]: Adjustable rubber ends are approximately 20mm long and 5mm wide. A universal size that fits most eyeglass chains. [Adjustable and Comfortable]: Easily adjust the grip on your glasses by moving the metal coil. Slide up to lock, slide down to unlock. Provides a comfortable and secure fit. [Wide Application]: These eyeglass chain ends are perfect for any craft project requiring a secure loop. A must-have accessory for various types of eyewear. Ideal for sunglass chains, sports eyewear straps, and more. Offering you great convenience.