Selected high-quality silicone, waterproof and sweatproof, durable and comfortable to wear Perfect fit replacement strap for Suunto D4, D4i, and D4i Novo Wrist Dive Computer Watch Band Wide: 24mm , Fits 5.7"-8.6" (145mm-220mm) wrist You can get: 1 set of straps, 1 tool, 2 special screw rods After receiving the strap, please do not rush to install it, compare it with your original strap and dial first, determ ine the appropriate one, and install it. If you have any questions, feel free to leave a message to the customer service, the customer service will reply to you within 24 hours