The Apollo 45681-218APO is the accessory kit for the Apollo Deckhead Mounting Box (45681-217). The Deckhead Mounting Box protects detector, sounder and sounder beacon bases where moisture or condensation could get in through the rear of the base. It is used on its own in most cases, but some bases need an extension sleeve or an adapter ring, which are supplied together in this kit.Key features Extension sleeve for fitting deep or heater bases: XP95 deep base 45681-209, XP95 heater base 45681-219, Orbis deep base ORB-MB-00019-APO and Orbis heater base ORB-HB-00020-APO Adapter ring for fitting base sounders, beacon bases and sounder beacon bases Allows the polycarbonate Deckhead Mounting Box to be used with Apollo audio visual devices Protects against water ingress Technical specifications Part number: 45681-218APO For use with: Apollo Deckhead Mounting Box 45681-217 Deckhead box cable access: 6 x M20 gland ports; fixed via 2 x 5.4mm holes What's in the box Extension sleeve Adapter ring