Here is a Porcelain Wire Spacer with markings of: LIMA, N.Y. // PAT. 2,921,112 Measurements: 4-1/2 inch across from point to point, 1-1/2 inch thick, 5/8 inch hole through at one of the points so that a tie wire can keep the spacer in place normally at the neutral wire. For use on insulated triplex service wire 120/240 volts, this will spread the 3 wires so a service drop tap can be made. Sky Gray glaze.