Everything you need for a high performance regulator setup in a doubles configuration. The Dive Rite XT Regulator - Doubles Set is two Dive Rite XT1 DIN first stages and two Dive Rite XT2 second stages. The primary second stage is on an { 84 in | 2.1 m } LP flex hose with a 70° swivel and the backup second stage is on a {22 in | 57 cm} LP flex hose. The brass & glass {2 in | 5 cm} diameter Dive Rite Mini-Tech SPG (in PSI) is on a { 24 in | 61 cm } HP flex hose. The set also includes necklace, small and medium S/S bolt snaps with hose clip retainers and regulator bag.