This is the Mares Atlas ADJ 62X 1st and 2nd Stage Diving Regulator Features: 2ND STAGEa ALL METAL TECHNOLOGY FOR BETTER PERFORMANCE, EVEN IN COLD WATERa EXTREME COLD WATER USEa VAD SYSTEM FOR NATURAL BREATHING AT ANY DEPTHa HIGH AIR FLOWa WIDE, PIVOTING PURGE BUTTON WHICH IS EASY TO USE, EVEN WITH THICK GLOVESa LIGHTWEIGHT SUPERFLEX HOSE TO ENSURE COMFORT DURING USE1ST STAGEa DFC LP PORT FOR HIGH AIR FLOW AT ANY DEPTHa AST - AUTO SEALING TECHNOLOGY FOR A DRY FIRST STAGEa PRE-ORIENTED LP AND HP PORTSa THE MOST COMPACT AND LIGHTWEIGHT MARES DIAPHRAGM 1ST STAGEa PEARL CHROME FINISH FACTS Material All Metal Technology First Stage Balanced Diaphragm HP Ports 2 HP 7/16" UNF Ports LP Ports 4 LP 3/8" UNF Ports