Piston segment bi-TNT Ø40mm shaft 10mm for 50cc TNT ORIGINAL aluminum kit vertical and horizontal minarelli

Bi-piston segment TNT "like graphite" replacement for the 40mm kit TNT bi-segment aluminum 50cc on minarelli vertical (booster rocket, bws ...) minarelli horizontal air or liquid (nitro, ovetto, aerox ...). This piston is of good quality, it has the two segments, its axis of its piston clips ....