Will my doubles (aka twinset) ship assembled?

No, due to weight restrictions our doubles packages ship as individual components ready-to-assemble: two cartons containing the cylinders (and boots for those packages that include boots) with modular valves (including port plugs) installed in the cylinders hand tight along with a third carton containing the manifold crossbar, bands and bolt kit, two loose Evidence of Inspection decals (aka VIP stickers.). You will need to assemble the package yourself prior to filling or if you prefer arrange for a local dive shop to assemble them for a fee. Assembling a set of doubles is easy if you follow our detailed doubles assembly instructions.