4 Kodak carousel 140 slide trays Each tray holds up to 140 2-by-2-inch slides. (Catalogue # 899 5193) Accepts slides mounted in cardboard or thin plastic mounts - NOT glass or metal mounts up to 1/16 inch thick. Measurements: 2.8 x 10 x 10.2 inches/25.4 x 25.4 x 6.4 cm 4 trays available. Each has a locking ring. The trays come from a smoke-free, pet-free house. $15 each or 4 for $50