1. The outside is made of high-quality Oxford cloth, which has a certain rainproof effect. The inside is filled with pearl cotton, which has a shockproof effect. 2. The zipper of the bag is made of high-grade anti-rust chain, which has a certain waterproof effect and is and not jammed. 3. The bag is fixed on the crossbar of the bicycle with Nylon Buckle for easy disassembly. 4. The bag is equipped with an outlet wire hole to facilitate battery or controller connection. Specification: Material: Oxford cloth Colour: Black Position:frame Portable : hanging Size:Length x Width x Thickness=32x9x10.5cm Package Contents: 1 x Electric Bicycle battery bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.