29mm nozzle closure, bulkhead, liner ejection tool and spare o-rings.
Nozzle closure has positive seal in two places. Bulkhead
closure has positive seal in one place and standard friction fit
delay element. Closure accepts small quantities of ejection
powder in the well and 3/8g is recommended for LMR and
1/2g is recommended for typical HPR rockets.
In particular the nozzle o-ring can be damaged
by installation of nozzles so bevel the nozzle edge slightly
with sandpaper to increase seal life.
A few closures for your every need.
Buy a spare set to make nozzle or delay
change-out more convenient on-site.