Petzl Pro Adapt Mounting Plate One Size. The system is especially resistant to impacts and moisture. Specifications for Petzl Pro Adapt Mounting Plate: Manufacturer: Petzl Weight: 48 g Size: One Size Features of Petzl Pro Adapt Mounting Plate Consists of two adhesive plates that resist impacts and moisture Allows the user to easily mount a DUO RL DUO S or DUO Z2 headlamp on a helmet: - allows the user to adjust headlamp tilt - compatible with Petzl helmets with or without eye shield For other helmets verify compatibility with the helmet manufacturer. Package Contents: Petzl Pro Adapt Mounting Plate Petzl E80004: Pro Adapt Mounting Plate One Size