Specifications include, but are not limited to: RISER,56IN X 56IN X 6IN, VAULT,CONCRETE RISER, VAULT, CONCRETE, REINFORCED, CERTIFIED H-20 LOAD RATING, OUTSIDE DIMENSIONS- 56 INCHES X 56 INCHES X 6 INCHES HIGH. SIX (6)-INCH WALL THICKNESS. FLAT TOP AND BOTTOM, 5/8-INCH STAINLESS STEEL LIFT INSERTS ON TOP OF EACH CORNER WITH REMOVABLE PLASTIC PLUGS INSTALLED. RISER,56IN X 56IN X 12IN,VAULT,CONCRETE RISER, VAULT, CONCRETE, REINFORCED, CERTIFIED H-20 LOAD RATING, OUTSIDE DIMENSIONS- 56 INCHES X 56 INCHES X 12 INCHES HIGH. SIX (6) INCH WALL THICKNESS. FLAT TOP AND BOTTOM, 5/8-INCH STAINLESS STEEL LIFT INSERTS ON TOP OF EACH CORNER WITH REMOVABLE PLASTIC PLUGS INSTALLED. RISER,56IN X 56IN X 18IN,VAULT,CONCRETE RISER, VAULT, CONCRETE, REINFORCED, CERTIFIED H-20 LOAD RATING, OUTSIDE DIMENSIONS- 56 INCHES X 56 INCHES X 18 INCHES HIGH. SIX (6) INCH WALL THICKNESS. FLAT TOP AND BOTTOM, 5/8-INCH STAINLESS STEEL LIFT INSERTS ON TOP OF EACH CORNER WITH REMOVABLE PLASTIC PLUGS INSTALLED.