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The manufacturer's new version of the Dust Muzzle, the Dust Muzzle Ultra, is based on the efficient side-mounted exhaust port design of the original version. The Ultra uses a flexible adapter ring that allows it to attach firmly to all grinders without pinching off the hose clamp. It comes in two diameters, 4- to 5-in. and 7- to 8-in., and is made from a new rugged plastic. Dust Collection Products by Shave Away, Europe Inc. 877-223-2154. www.dustmuzzle.com.