Replaces aluminium piston:  83-3188 which used seal: 141-28131-K022

Manitou TS AIr uses positive air and negative coil spring with rubber top-out bumper
It has been used since 2006 in the Manitou R7 and continues today.
The TS Air pistons have a 13mm flat bottom recess to fit with the flat end of the TS Air spring compression rod.
The ISO Air system is similar to TS Air but has an additional isolator fitted in the bottom of the piston and a rounded end compression rod.