Specifications: Product Name: Folding Pre-Tighten Cushion Main Material: Silica Gel Product color: Black Product size: 15x13x10mm/0.59*0.51*0.39" Net weight of product: 3g Applicable: for Ninebot Es1 Es2 Es3 Es4 Notes: 1. Please allow little measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Included: 2 X Pre-Tighten Cushions