View Larger Image Charlotte Marks Another First Kerotest introduces the FIRST “universal” electrofusion control box to the natural gas market, the Charlotte Universal Electrofusion Control Box . KerOTest34562019-01-04T15:37:06+00:00November 19th, 2018| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: KerOTest3456