FEATURES:- Captive stainless steel nuts allow for custom attachment methods to the support base including easy attachment of stainless steel strut, threaded rod or other project-specific hardware- Foam bottom offers low abrasion interface for better roof membrane protectionCompatible with roof surfaces including single ply, bituminous, metal and spray foam- Provides superior load distribution, even with varying rooftop surfaces- Multiple sizes and load ratings offer the ability to tailor the solution to the application- Includes square holes for creating an H-Frame with a 12" (305 mm) cross support (PBU16 only)- Base is manufactured from UV-stabilized thermoplastic material- Supports green building requirements; thermoplastic bases are made from recycled material and can contribute to earning LEED credits