Libera is a chair with polypropylene shell, STACKABLE sledge base, polypropylene glides with hooking device for straight rows.‎ Available with REMOVABLE polypropylene writing tablet with anti-panic joint and metal frame.‎AVAILABLE MODELSLI | Polypropylene shell.‎LC | Polypropylene shell with padded seat.‎COLORS & FINISHINIGAvailable in different colors and finishingsCERTIFICATIONSEN 16139 / EN 1022 / EN 1728