Height adjustability provides effective navigation of pipe, conduit, duct and cable tray around obstructions;Foam bottom offers low abrasion interface for better roof membrane protection;Compatible with roof surfaces including single ply, bituminous, metal and spray foam;Provides superior load distribution, even with varying rooftop surfaces;Ready to use out of the box, saving installation time and labour;Multiple sizes and load ratings offer the ability to tailor the solution to the application;Hot-dip galvanized and UV stabilized for long lasting performance;Supports green building requirements;thermoplastic bases are made from recycled material and can contribute to earning LEED credits