Irvine Spinner 89mm - Chrom Irvine E-IRVSPIN89CR hrome finish to help you model really stand out! With a lightweight, machined aluminium backplate, you know this is a high quality spinner as soon as you see it. With no backplate flex, it will run true and stay in shape season after season. It also has a unique easy-trim feature where the material around each propeller cutout is thinned to half the thickness of the surrounding material to make trimming to suit different blade shapes easy.