Specifications: Mountain bike seatpost seat tube sleeve. Aluminum alloy CNC machining, surface anodizing. Make your bike more excellent. Type: Bike Seat Tube Sleeve Material: Aluminum Alloy Height: 33.9-34.9: 40mm/1.57 #34;, Other Type: 60mm/2.36 #34; (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Bike Seat Tube Sleeve