Built to a rigorous set of commercial standards, each RIBCRAFT 9.0 undergoes a strict series of stability and buoyancy tests. The integrated internal stringer system designed to ABS standards for High Speed Craft makes for an incredibly strong and rigid hull capable of supporting the heaviest loads, the roughest seas, and the harshest abuse. Powered by outboard or inboard engines up to 450 horsepower, her design supports considerable power with speeds in excess of 40 knots. The standard tube set found on the RIBCRAFT 9.0 features seven air chambers with pressure relief valves, overlapped and doubled up seams, and reinforcing at all pressure and wear points. Attached over an extended hull flange, the tubes provide incredible stability, buoyancy, and shock dampening properties. Durable and reliable, RIBCRAFT tubes are among the most trusted in the industry.