3 Wheel Calculator indicates Horsepower & Gas Compression on one side with a Delivery Date Finder on 2nd side. Digitally printed in high resolution full colour & UV Varnish directly on to the .020 White Vinyl Plastic material. This makes for a top quality, long lasting wheel. Use our standard template or supply your own customized one. Ideal for Oil, Gas & Gas Compression Industries. Custom imprint & any bleed edge included. Outside wheels are 4.38" dia. & 4.5" dia. - Middle wheel is 5.38" dia. 5.375" Diameter