Mast Tip Plug (fits both SDM & RDM) Chinook universal

Has your mast tip plug gone missing or fallen victim to the ravages of time?  We know this can be a difficult topic to discuss but we are here to help.  Replacement for SDM and skinny RDM masts.

Two 1" O-Rings on a  7/8" wide by 1-7/8" long barrel