Features: This GoPro accessory set includes one float sponge box, one 3M adhesive sticker and waterproof backdoor case. Easy to spot flotation backdoor lets your camera float in water. Industrial strength 3M adhesive backing attaches the sponge directly to the HD Hero waterproof backdoor. A HERO waterproof backdoor is included. Compatible with GoPro Hero 3+. Specifications: Type: Float sponge box & 3M adhesive sticker & waterproof backdoor case Material: PC & sponge Package size: 13 * 9 * 4cm / 9.1 * 3.5 * 1.6in Package weight: 30g / 1.04oz Package List: 1 * Float Sponge Box 1 * 3M Adhesive Sticker 1 * Waterproof Backdoor Case Note: Sponge will not support the weight of the suction cup mount or additional weight of the BacPac accessories when used with the HD HERO 3+ cameras.