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. 1-1/8 in X 1/2 in X 5/16 in, Grades M/F, Commstone, Small Motor Combination.When compared to turning tools commstones are easier to use, more time effective, and remove less copper.
Cleaning for Oxygen Service O2 is available only for dry or HL Halocarbon filled gauges.. Pressure Gauge, 4" 304SS Case, 316SS Internals, 60 psi, 1/4 NPT Male Back Conn, Glycerin Filled, 304SS Bezel & U-Clamp Corrosion-resistant fillable dry or liquid-filled gauge.