1. Silicone rubber hoses 2. Different shapes 3. Different sizes 4. Works for radiator, intercooler and so on We have Straight Hose,Transition Hose,90 Degree Hose,90 Degree Transition Hose,Hump hose,45 Degree Hose ,45 Degree Transition Hose.There are many sizes,colors for your choose. 3 to 4 layers silicone hoses for raidator, intercooler