The Sowester Lifejacket Kit 33g Cylinder & Halkey Roberts is a complete re-arming kit for lifejackets that take 33g gas cylinders and a Halkey Roberts salt bobbin.For optimal safety and performance, we strongly recommend having your lifejacket serviced at our dedicated service station in accordance with the manufacturers guidelines. Our trained technicians ensure all components are inspected and replaced to the highest standards.However, if you are experienced and competent in lifejacket maintenance, you may choose to replace the parts yourselfIncludes33g CylinderHalkey Roberts Salt BobbinRetaining Clips (Selection to suit all lifejackets)