Features: External Battery Mounting Bracket Holder Support Hardware For Electric scooter ES2 ES4 and high quality Made of high quality materials, durable and practical Fit for Ninebot es2 es4 Included are the following: Mounting rail The screws for attaching the rail to the downtube Stainless steel bolts for attaching external battery to rail Rubber bolt hole cover plugs Specifications: Material: Metal Color: Black Size: 26.5 x 2 x 2.5CM (Approx) Package Contents: 2 x Mounting Bracket (Including Screws) 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.