This Mares 28XR HR Sidemount Set is suitable for sidemount or doubles diving, and comes unassembled. The set includes:

• Two Mares 28XR DIN First Stages
• Two Mares HR Second Stages
• One { 83 in | 210 cm } Miflex XT-Tech LP Reg Hose for the primary
• One { 24 in | 60 cm } Miflex XT-Tech LP Reg Hose for the secondary/backup
• Two { 9 in | 23 cm }Miflex XT-Tech QD Hoses
• { 3.3 ft | 1 m } of { 4/25 in | 0.4 cm } shock cord
• Two SPGs with { 6 in | 15 cm } HP Miflex Hoses

The Mares 28XR DIN First Stage is a balanced diaphragm and twin balanced piston regulator in a compact and rugged high-impact chrome body that provides constant and effortless airflow unaffected by depth, tank pressure, or breathing rate. It is AST environmentally sealed for underwater removal. It features four standard size low pressure 3/8-inch ports on a swivel turret with an additional fifth port on top of the turret, all with natural DFC. Two standard size high pressure 7/16-inch port have a 10-degree port angle for optimal hose positioning. The first stage is environmentally sealed for cold water performance, and comes standard with a 300-BAR DIN connector.

The high-performance Mares HR Second Stage features an ultralight technopolymer body for light weight. The ultralight technopolymer body features a pneumatically assisted design, adjustable breathing comfort and an oversized purge button.

The complete set is can be opened, cleaned or fixed underwater, and is ideal for stage, sidemount or backmount diving. The manufacturer's recommended service interval is every two years or one hundred dives.