For use with all AeroTech RMS-18/20 motor reload kits. This reusable AeroTech RMS-18/20 aluminum motor plugged forward closure requires an aluminum motor case and aft closure. The plugged forward motor closure is used with RMS-18/20 Plugged motor reloads only. Motor reloads and aluminum hardware sold separately. Important: Mid Power RMS reload kits are not compatible with High Power RMS products.