Waterproof battery cover, for Hailong, Polly, Tiger Shark and Dolphin style batteries. The images show the cover fitted on a Cap Rouge

2 sizes -

Up to 17.5AH (Small) for Downtube Batteries 

or

Over 17.5AH and up to 52V 25AH (Large) for Downtube Batteries 

This cover is excellent for people worried about excess water, dirt and mud getting on their battery