Ebike Battery Cover - Protects your battery safe from the rain, snow and keeps battery insulated Insulates battery to help operate more efficiently Protection against the elements while riding or transporting on a car rack Scratch protection Pocket for phone (or keys or wallet) 4mm neoprene black Size Medium fits 3.5" to 4.5" in diameter. Compatible with Pace 350.2, Pace 350.3, Pace 500.2, Pace 500.3, Soltera SS, Soltera 7S, Soltera 2, Ramblas models Large fits 5" to 7 " in diameter. Compatible with Level, Level 2, Level 3, Sinch ST, Sinch 2, Sinch 2.5, Aventure, Aventure 2, Aventure 3, Aventure M, and Abound Models