1: folded seat post 2: diameter: 25.4MM, 26.6MM,27.2MM, 28.6 MM, 30.8MM, 31.6MM, 33.9MM, 35MM 3: Length: 300MM, 350MM,400MM

1: folded seat post

2: diameter: 25.4MM, 26.6MM,27.2MM, 28.6 MM, 30.8MM, 31.6MM, 33.9MM, 35MM3: Length: 300MM, 350MM, 400MM, 450MM, 500MM, 550MM, 600MM

4: Color: Silver, black, golden, green , purple and white

bike seat post