Cave Cut Design
With its non-bungee design and valves nicely located for doubles, the X Series bladder is compact, clean and perfect for use with a doubles rig.Features
•37 & 55 & 55Dual lbs. Lift capacity bladder
•Welded flange and one piece retainer for servicing without the need for tools
•Outer Shell constructed of HD Laminated 1000 denier Cordura
•Thick 15mm urethane internal bladder
•Streamlined design for reduced drag and passing through tight spaces
•Centrally located elbow to avoid tank valve/regulator interference
•Lower left pull relief valve
•No bungee
•Cam band slots
If by welded flange, they are talking about welded "flanges" for inlet and exhaust, over the years I have seen only failure welding plastic to urethane.
Perhaps attachment methods have improved, however I think separate independent threaded fittings using compression and or rubber washers is the preferred configuration
Unless of course the bladder is fifteen milimetres thick?