I have tried many electric meter replacement covers, these are the BEST!
Constructed of UV stabilizes high-molecular weight, engineered thermoplastics that have exceptionally high impact strength over a wide temperature range.
Characterized by an excellent combination of toughness, transparency, heat and flame resistance and dimensional stability.
In impact tests, the covers resist breakage at very low temperatures and are shown to be over 250% stronger than glass. Humidity changes have little or no effect on dimensional stability. Even exposure to boiling water does not significantly change dimensions after returning to room temperature.