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I think EE sells the valve alone.
Would you mind spelling out that acronym?
Frog SMB's in the Europe side of the world is 1m tall; but push to inflate.
HOG has a 4.5in SMB that's real skinny and very comparable; also push to inflate.
I think Deep Sea Supply 1m isn't a push to inflate. But kinda odd looking.
I always thought their design shape would make more sense if they had a 4ft or taller SMB.
Other than that. I found this while looking for pictures.
Made by Gear4Tech; Europe side manufacturer.
If you decide to be the guinea pig, would you post your results here?
surface marker buoy - SMB with valve, 130cm slim tube
View attachment 202954
Why don't you just buy the Halcyon bag? I don't have much Halcyon gear, for some very specific reasons, but I gave up a long time ago and bought them, because they are quite simply the best.