The Habitrail Ovo Loft is the largest hamster environment on the market today and it comes with a steel top grill opening. Steel top grill maximizes air circulation and allows top access to your pet with 2 side door holders. Three access points to interact with your hamster. Made of durable Polycarbonate and ABS injection molded plastic. Easy to clean. Deep base design with rounded corners. Main unit measures approximately 27" x 12" x 12" tall (excluding external accessories). Includes: Main habitat Water bottle Food dish Exercise wheel Cozy Hideaway (2) Windows (2) Lock Connectors Interactive chewable maze (replacements available)