Genuine OEM SeaStar Dometic HS5182 Seal Kit.    This kit fits brass cylinder #'s BA 150-7, BA 150-9 TM and TMB. 

Dometic now owns Seastar.  This is a genuine Dometic Seastar OEM factory original replacement part, not aftermarket.  There are many imitations out there.  Use only these genuine factory original parts for your repair.