Handlebar Seatpost Pole Bike Roll Bar Mount for GoPro HD Hero Hero 2 Hero 3 Camera ST-68 Brand new and high quality. Easy to install & remove. Light weighted and portable. Material: plastic, metal. Color: black. Compatible with Gopro Hero 3/2/1. Suitable for tubes diameter of 1.9cm-3.5cm. Size: 8cm x 8cm x 2cm.