Used ScubaPro Twin Jet Max Scuba Diving Fins - Large - Graphite - US M:11-13 / W:12-14 Dive Light Accessories The second stage valve is

The second stage valve is pneumatically balanced resulting in unparalleled performance and consistent breathing from start of dive to end

it is not a dive computer

Ergonomic foot pocket with extended heel plate

controlled SMB deployment and quick line retrieval even with thick gloves

Used ScubaPro Twin Jet Max Scuba Diving Fins - Large - Graphite - US M:11-13 / W:12-14 Dive Light Accessories The second stage valve isPlease note this is a USED ITEM offer. The item will be in good working condition, may show signs of use or wear. PRODUCT DESCRIPTION The twin jet max fin features a patented split hydrofoil shape to deliver optimum power with minimum effort, plus dual compound construction, which enables scubaPro to fine tune performance and optimize maneuverability and diver comfort. This product does not carry a valid manufacturers warranty.