Three Heat - Four Position Switch with Knob Mayco The rubber pad is new

The rubber pad is new and designed to last longer than the old foam style

adding Frit 3134 to a recipe (to supply boron for example) does not require reduction of clay content

Also used for its ability to give color stability in glazes and control texture and craze resistance

It fires a light colour with approximately 10% shrinkage at cone 10

the maximum range is not much beyond that

Three Heat - Four Position Switch with Knob Mayco The rubber pad is newThis switch is referred to as a 3 heat or 4 position switch. It's compatible with all Olympic electric kilns. This switch replaces previous versions of the same switch and comes complete as pictured with a new switch knob. The new knob is required as older previous switch versions knobs won't fit. Wiring Diagram Compatibility Chart