First 15X stageThe 15X balanced membrane first stage has one DFC output and pre-oriented outputs making it suitable for the octopus configuration as well. It is very compact and has a sandblasted finish.The DIN300 balanced membrane first stage weighs 598g. In the INT version it weighs 772g. Rover second stageThe Rover second stage guarantees high performance even after intensive use. The new large vent button features a 'dynamic hinge' design, which makes the venting function easy to activate, even with a single finger. It also prevents free flow in the event of strong currents and is made of a durable rubber material that can withstand over 113,000 venting cycles. The patented Mares Vortex Assisted Design (VAD) system combined with the Fluid Dynamic Deflector (FDD) enables natural respiration at all depths. The Rover's combination of durability and performance make it the ideal regulator for intensive rental use. Rubber hose. Specs Material - Ultralight Technopolymer First Stage - Balanced Diaphragm HP Ports - 2 HP 7/16" UNF LP Ports - 4 LP 3/8" UNF