The protective shell is soft and skin-friendly, which can bring you comCompatibletable wearing experience. The protective shell can effectively keep the edge of your watch movement from scratch, impact and bump. Made of TPU material, the watch protective shell is durable and environmental-friendly to use. The diameter of the protective shell is 44.5mm. The protective shell is suitable Compatible Garmin Compatibleerunner55/158. Item Name: Watch Protective Shell Material: TPU Color: Transparent Black, Transparent White, Transparent Blue Applicable Model: Compatible Garmin Compatibleerunner55/158 Features: Shockproof, Hard, Anti-scratch Size Details: Diameter: 4.45cm/1.75" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. Package Includes: 1 x Watch Protective Shell(Movement Not Included)