First Stage• New compact sized piston -controlled first stage• Close to 20% smaller than our MK25• Mid-range piston 1st stage offering the best compromise for the right price and the right performance.• Easy maintenance.• Unique thermal exchange design with external fins• Optional replaceable head for optimal positioning with 4 LP routing configurations (0°/30°). Ideal for Technical diving.• Standard head with 4 LP hose routing (+/- 20°)• 2 HP ports, one on each side of the body.• Polished chrome plated marine grade brass• Re-designed yoke and cap