This 38/120 Motor Case by Rouse-Tech (left-most item), for use with high power Aerotech motor reload kits, is authorised by Aerotech and 100 % compatible with the relevant Aerotech RMS reload kits.
For use with the following reload propellant kits:
G61W-M
G67R-M
G69N-P
G339N-P
You require: 38mm forward closure, 38mm aft closure, and in some cases 38mm seal ring.
Motor Cases, Closures and Seal Rings are also available in sizes 29mm, 54mm, 75mm, and 98mm.