Littlefield 10-71 polished alum. gas blower. This blower has nylatron stripping on the tips of the rotors to insure maximum efficiency on your supercharger. The rotors are cast and hard anodized for a long lasting supercharger and the blower uses double lipped teflon seals and steel gears to insure proper rotor timing. The front cover and bearing plates are made from billet alum. to provide a superior polish and add extra strength.