Aldila RIP Phenom Graphite Wood Shafts.Features: Incorporates tour proven RIP Technology with a unique composite construction to create a new, innovative flex profile for maximum distance and control – the Hyperbolic Flex Zone Stiff tip section for optimal launch and spin control, firm butt section for stable feel, softer mid section for optimal kick through impact for maximum ball speed 50 gram and 70 gram weight options available. .335" tip diameter