【Compatible Models】:Silicone Magnetic Clasp Strap for HK13 Ultra 2 Watch. Please choose the right size according to your watch accessories dial. 【DESIGN INSPIRATION】:In the process of daily use, many customers' remarks: wearing/disassembling magnetic watch bands are the most satisfying. So we designed this bracelet with magnetic silicone clasp. It has excellent sense of magnetic wear feeling, and has the advantages of skin-friendly silicone material, soft, durable, comfortable, lightweight and waterproof. 【Easy Installation/Adjustable】:The replacement band for your watch comes with watch lugs on both ends, which locks onto your watch interface precisely and securely. Don't worry the watch will fall off. Just need to close/open the magnetic buckle to install/take off the watch bands. Made of high performance custom rubber, our silicone watch bands are durable and sturdy.