The flared cylinder base is far superior to the standard pump for fit and comfort. Pump may be used with or without a latex sleeve. The soft latex sleeve, though, is for maximum seal and comfort. The frosted 7 1/2" cylinder is see-through for visual and tactile pleasure. This pump has a quick release trigger safety valve, comfortable easy-to-use pistol grip handle, flexible hose for maneuverability and comfort plus a pressure lever and easy to read industrial grade pressure gauge for monitoring pleasure-pumping action. Let's get pumped!