THIS HUMIDIFIED REVOLVING SELECTOR WAS MADE BY GRAPHIC RESOURCES CORPORATION. SOLUTION IS KEPT ON A SPONGE IN THE BOTTOM AND IS IDEAL FOR PREVENTING INK DRYING IN PEN CARTRIDGES. IT HAS SPACE FOR 12 PENS AND STANDS 7 INCHES TALL. IT IS IN GOOD CONDITION. FOR OTHER VINTAGE COLLECTABLES, ANTIQUES AND ITEMS OF HOUSEHOLD INTEREST PLEASE VISIT MY OTHER ADS.