Here we have a heavy duty EIV suspension insulator, the glass shell is 12-1/2" across green / aqua in color. The markings on the metal cap are: 10000 - 24 // EIV 68 // C the other side has: 300F - 01 // 75000 LBS These two suspension have been in the suspension collection for many years and I decided it was time to hang them up outdoors, these things take a special type of hanger which I have not been to obtain over the years, but with the help with of a fellow power collector from the Northwest, I now have a hanger that fits close enough to hang these heavy duty suspensions.