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Whether your preference is for a lightweight plastic composite register or your application demands a heavyweight diffuser to withstand the harshest environment, the Hart & Cooley Rezzin™ line of products is for you. Rezzin™ registers and diffusers are constructed of lightweight polymer materials that maintain the same high quality strength and rigidity. Looks that go beyond the surface. Other than the material, there is no significant difference between the Rezzin™ registers and diffusers and other Hart & Cooley steel or aluminum models. They will deliver the consistently high performance and confidence you expect from Hart & Cooley products.