Bicycle seat pillar SC-S-124 in 5", 6", 7", 8", 9" and 10" lengths, offered plain or with knurling, in ZP, BCP or Black finish. The pillar carries the saddle and slides into the frame's seat tube to set riding height. It is a straight round tube; the knurled version has a cross-hatched grip band near one end, and the plain version has a smooth body that narrows at one end.