Titanium Seatpost for Brompton
（PS:Laser logo, add $5）
Material:TitaniumGR9 Ti-3Al-2.5V
Main Pipe wall thickness：1.2mm
Φ center:31.75mm;
Length: 550mm， Extended Version：600mm
Weight：
A Type , Weight: 248g±3g ，63.9% of the weight of the original seatpost，save weight:140g
B Type , Weight: 346g±3g ， 70.0% of the weight of the original seatpost，save weight:149g
C Type , Weight: 321g±3g ，79.2% of the weight of the original seatpost，save weight:84g
D Type , Weight: 361g±3g ，73.1% of the weight of the original seatpost，save weight:133g
E Type , Weight: 376g±3g ，92.8% of the weight of the original seatpost，save weight:29g
All Extended Version: Add 26g
