PRODUCT LINE: Super Duct DBII Pipe are designed for concrete encased and direct burial applications for power utilities, street lighting and communication distribution systems. Specially formulated from a high impact PVC, Super Duct DBII Pipe have superior load bearing for use in duct banks. FEATURES: Manufactured with a specialized compound;Engineered for high impact and crush strength specifically required by utilities for underground duct;Specialized compound enhances the friction coefficient of Super Duct for easier pulling of conductors/wires through long runs;Conforms to the testing requirements of CSA standard C22.2 No. 211.1 both for encasement in concrete masonry and for direct burial.;High-impact and crush strength demanded by today's utility companies for underground applications;Easy to assemble;Conforms to the requirements of CSA Standard C22.2 No. 211.1 for encasement in concrete and direct burial.