Double-grip, ratchet-style Hose Clamps are made from a tough black Nylon material that can withstand pressures up to 100 psi. There are sizes available to fit hose OD ranging from 0.22" to 2.97" (5.6mm to 75.4mm). The clamps can tolerate temperatures from -40º F to 340º F. They also have high chemical resistance including gasoline, oils, and most solvents.