Baby: Diameter 31.8mm seat tube quick release clip
Color: black， white， red， blue， gold
Specifications: Diameter 31.8mm， for a diameter of 27.2mm - 28.6mm seatpost
Depending on your seat tube seat tube clip size to choose:
28.6mm seat tube clamp - for 25.4mm seat tube， mostly for road vehicles or dead fly.
31.8mm seat tube clamp - for 27.2mm - 28.6mm seat tube.
34.9mm seat tube clamp - for 30.4mm - 31.8mm seat tube.
38.5mm seat tube clamp - for 33.9mm seat tube， mainly folding bikes.
Note: When you purchase must see for themselves whether the vehicle seat tube models