This aluminum seal disk is included in Aerotech High Power reloadable motors RMS 29/240 and RMS 29/360. It is required with the H210R, H220T, I200W e H268R reloads for these motors.

If you own a shorter RMS 29 mm motor and you purchased a longer casing (from 240 up) you will need this seal disk.

The Forward Seal Disk acts as an additional seal to block the hot gases which can blister and damage the internal surface of the motor case.