Commstones should be twice as long as the width of the longest flat spot and as long as will work freely between adjacent brush sets.2 in X 1-1/2 in X 1 in, Commstone, Grade Ep With Straight Handle Stone mounted on a straight handle for difficult to reach commutator When compared to turning tools commstones are easier to use, more time effective, and remove less copper..
.HUMITRAC DUCT MT TRANSMITTER, 2% ACTIVE HUM/ TEMP, -40C - 60C Analog outputs for the humidity channel and temperature channels are field selectable 4-20ma, 0-5VDC, or 0-10VDC.