Titan DIN 1st Stage scuba regulators and Titan/Conshelf DIN scuba adaptors made by Aqua Lung USA – serial numbers lower than 6062501 stamped on the side of the body and marked “300 BAR MAX” on the side. Sold nationwide from January 1997 until October 2008. Over-tightening of the DIN retainer during installation can cause it to break, and the regulator can detach from the scuba cylinder, posing a drowning hazard. The company has received one report of a retainer breaking. No injuries have been reported. What to do: Call 877-253-3483 or go to www.aqualung.com or www.cpsc.gov.