The Water Topper™ holds 9 gallons of water between its dual walls and lots of gear in the tub above. Fits all Ruff Land Kennels from Intermediate through X-Large (excluding Intermediate SUV). Sits flush on standard Intermediate. Durable roto-molded construction. Dimensions: exterior: 29″ x 19″ x 9″ storage area: 23 1/2″ x 13″ x 7″ weight: 18 lbs.