Clamps for heated glass plate Ultimaker 4 mm

Those two clamps will fit a glass plate 4mm thick to replace the acrylic building plate in Ultimaker1. I had a glass plate of about 18.5x19 cm, sticked a heater foil to it, and mounted it with those two brackets.
Used some glue (Bison glass glue, UV-curable) to glue the clamps to the glass but basically, they fit tightly and this is not neccesary.

This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/fhmaUdirefF