OMS Safety Pocket For Smb And Spool (Bag Only) This quick drain mesh bag can accommodate a Surface Marker Buoy and a spool or other accessories such as macro lenses, color filters or a small wide angle dome. To secure this pouch, utilize the 2 inch ( 50mm ) strap located on the back of the Safety Pocket to easily slip standard webbing through.FeaturesLightweight & compactEasy to locate in your luggageFolds up flat when not in use