The DIR Zone Surface Marker 120 cm can be inflated orally or with inflator hose. Made in Europe from high quality components. It is 120 cm in height, and comes with Heavy Duty Over Pressure Valve.   Closed circuit surface markers guarantees gas holding on the surface. This surface marker must be used with a Finger Spool. Check out the Dive Box Finger Spool of various length, to go along with the DIR Zone Surface Marker!   Available in 2 colours Orange and Yellow. Links for all courses - https://gs-diving.com/padi-courses/ Also check out Dive Singapore for the variety of gears we carry visit : https://www.divesingapore.sg/