The Lightweight Silicone AirTag Cases by wanchel are a set of 4 keychain holders designed specifically for pets and luggage. The cases are made of silicone and feature a sturdy metal snap, spring-ring clasp, and an anti-lost keychain for easy location of items. They are environment-friendly and durable, with a high elasticity silicone material that ensures a secure fit for your AirTag. The cases are lightweight and have a solid color design, perfect for unisex adults on the go. Each case measures 3.35 x 1.57 x 0.08 inches and is compatible with the AirTag 2021 model.