Hose manufacturers each use a diverse range of materials that can result in a variety of hose styles. They design their hose and coupling components to fit their own tolerances. Hoses from various manufacturers may have similar dimensions and constructions, but different rubber compounds and reinforcement materials make a huge difference when it comes to hose failures and every manufacturer's "recipe" is unique. contact info@offshoredimensions.com for your Hoses and other Parker Hannifin products