PADI Delayed Surface Marker Buoy (DSMB) Diver
The ORIGINAL and The BEST
The mini-cylinder is small enough to fold unobtrusively inside the SMB to be stowed in pouch or pocket. An over-pressure / dump valve prevents bursting and allows deflation after use.
The 0.1 litre mini-cylinder is easily replenished by decanting from the pillar valve of a regular air cylinder.