Description: 100% brand new and high quality. Durable,wear and tear resistance. 7 adjustable gears for 21 speed bicycle. You can adjust front 3 gear + rear 7 gear,namely 21 speed or other feasible combination. Make you ride the bicycle more comfortable. Including inner gear cable,no spool. Applicable for some ordinary bicycle,mountain bike,folding bicycle,road cycling,etc. Specifications: Type: Trigger shifter Model: TX30-7 Material: plastic Color: black Caliber: 22.2mm Gear: 21 Speed Occasion: Bicycle,bike Package Include: 1 pair of Trigger shifter Note: 1. Due to the light and screen difference, the item’s color may be slightly different from the pictures. 2. Please allow 1-3cm differences due to manual measurement.