Features:* The strap size can be adjustable* Durable nylon strap is easy to install and remove* One size fits for all adjustability* Compatible with ALL HERO3、 HERO2、 and HD HERO Original Cameras、 except the Digital HERO 5 Wrist Camera.* Size: 10 x 8 x 8 cm* Color: BlackPackage Includes:1 x Adjustable helmet strap