Features:
For changing 28.6mm seat post into 25.4mm seat post;

Specifications:
Color: black
Material: aluminum alloy
Size: 36 x 28 x 28mm/1.42 x 1.10 x 1.10"
OD: 28.6mm/1.13"
ID 25.4mm/1.00"
Weight: 14g

Package Content:
1 x Bicycle Seat Post Reducing Sleeve Adapter