Titan Reverse Cantilever Polyproplene Chairs Conforms to FIRA EN1729 Parts 1 & 2! The ultra strong Titan Reverse Cantilever Chair is available in 12 shell colours and 4 seat heights - the ultimate cantilever classroom chair. The unique reverse frame allows students to hang the cantilever chairs on the top of their classroom desk to allow easy floor cleaning. Moulded from a one piece high impact polypropylene shell, bolted to an incredibly strong cantilever steel frame makes the Titan Reverse Cantilever Chair almost unbreakable. Designed by Titan and developed solely to withstand the heavy duty day to day use thrown at them. Shells are available in 12 vibrant colours with the frames epoxy powder coated in a modern silver finish.