The Key opens the classic twin jumbo bath tissue dispenser, R4000TBK and is compatible with all SJ dispensers with a waffle/zig-zag keyhole. The dispenser offers the highest capacity of any tissue dispenser. Its slim and compact size makes it a perfect fit in any washroom. The Infinity System provides continuous availability of tissue and prevents access to the spare roll until it is completely empty, eliminating stub roll waste. Dispenser sold separately. - Sold per each