Quaziteite® ANSI/SCTE 77 certified enclosure boxes, feature a high quality polymer concrete construction in a multitude of sizes and depths allowing customization for any application. Underground Polymer Concrete Box Stronger and lighter weight than regular concrete Cost effective Durable and long lasting Fire and chemical resistant Standard sizes are UL certified Hubbell offers three distinct brands of underground enclosures. All three are built with the same. Quaziteite® ANSI/SCTE 77 certified enclosure boxes, feature a high quality polymer concrete construction in a multitude of sizes and depths allowing customization for any application. Underground Polymer Concrete Box Stronger and lighter weight than regular concrete Cost effective Durable and long lasting Fire and chemical resistant Standard sizes are UL certified Hubbell offers three distinct brands of underground enclosures. All three are built with the same.