DiveSmart 5ft Scuba Diving Open Bottom Surface Marker Buoy (SMB) Kit with 100ft Finger Spool ABS Dive Reel, High Visibility Surface/Signal Marker, Whistle HIGH VISIBILITY DESIGN: SMB is a 5ft Marker that is a High Visibility Design, Padded Valve Cover and a Weighted Bottom to Stabilize the Safety Sausage EASY FILL: SMB (total weight 63 grams) can be filled using the oral inflator, or through the use of a regulator in the bottom of the SMB. NEW REFLECTIVE BAND: The Surface Marker now includes a reflective band for added safety and for divers to be easily seen. RUPTURE RESISTANT: Built-in Over Pressure Relief Valve allows the tube to ascend without rupturing. INCLUDED: ABS Finger spool dive reel with 100ft of #24 braided nylon line and double ended Brass / Gold Bolt. In addition a whistle is attached to the SMB for surface emergencies/signaling