brand new and high quality Introduction: Hi,Friends!First please allow me to thank you for riding bicycle in your daily life,both of us know that this healthy,low-carbon life style doing great help for our mother planet,hope we can keep it as one of the best way when go out.No matter you just look a trigger shifter for your ordinary,or professional bicycle,This trigger shifter can help you ride more safe.Speed is exciting,so is life! Features: Durable,wear and tear resistance. 7 adjustable gears for 21 speed bicycle. Including inner gear cable,no spool. Aluminum alloy and iron cable materials products. Efficiently make you ride the bicycle more comfortable. One has 1-7 numbers for you to choose gear,other is spin button without number. You can adjust front 3 gear + rear 7 gear,namely 21 speed or other feasible combination. Can be applied for some ordinary bicycle,mountain bike,folding bicycle,road cycling,etc. Specification: Product Name: SL-TX30-7R Trigger shifter 7 Gears 21 Speed For Mountain Bike Cycling Material:Alloy + Plastic Net Weight:207 grams Color:Black(As shown in the picture) Fit handlebar: 22.2 mm Cable length: about 165 cm-205 cm Model: TX 30 Components:Trigger shifter Gear:21 Speed Occasion:Bicycle,bike Quantity: 1 set Warm prompt: 1.As different measuring methods,it will occur 1-3 for cm deviation about the items,please ensure that it is okay for you before ordering; 2.Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding! 3.This trigger shifter apply for almost standard mountain,folding bike,maybe not suitable for other special bicycles. 4.Trigger shifter only,other accessories irrelevant demo in the picture are not included. Packaging includes: A Pair of Trigger shifter x 1