Cylindrical Taper Ring Gage - JarnoWESTport Gage manufactures a complete line of standard taper ring and taper plug gages;Morse, Jarno, Brown & Sharpe, Jacobs, National Machine and any other special taper gage made to your blueprint specifications. WESTport also manufactures tapered arbors to your print or our engineering team will gladly assist in developing drawings for your application based on common gaging practices.