Dive Rite 4ft SMB

4ft Dive Rite open bottom SMB.  Overall excellent condition.  Open bottom is for easily adding air to deploy the SMB.  It does have a baffle so that when the SMB hits the surface it does not allow the air to escape.  Also has OPV and oral/BCD inflator hose nipple on the side.  Folds up nicely in a self contained pouch for easy storage.