Features:
Wide Angle 170 Degree 5MP Replacement Lens 2.5mm  1080p 11MP For Gopro HD Hero 2
Made of high-quality plastic and   metal, durable in use
170 degree field of view
Professional and high-definition
It is easy to use
It provides optimal light and image   effect with minimum distortion
Weight: 30 g
Dimensions: 0.87" x 0.71" / 2.2 x  1.8  cm (L x Dia.)
Material: Plastic, Metal
Color: Black
Wide-angle Degrees: 170°
M12 thread interface.

Package contain:

1x Lens  for GoPro Hero 2