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Online Plastics® stocks Mar-Bal Glastic standoff insulators. These insulators are high strength, shatter, moisture and flame resistant. They are UL recognized as follows: Standoff insulators 1603, 2015, 1461, 1872, 4610 and 4640 are UL Safety 891 recognized. In addition they are shatter resistant and have closer height tolerances than porcelain insulators.
Available in many styles
Closer height tolerances can be achieved than with porcelain insulators