The recommended cage spacing is 3-6 cm (1.2-2.4 inches). Please carefully measure the cage spacing to ensure compatibility before purchasing. This helps avoid issues with spacing that may prevent proper installation. Perfect size for small animal cages: 10.8 x 16 x 22 cm food feeder and 10 x 15 x 20 cm water dispenser with a total capacity of up to 800 ml. Bowls with 4.2" and 3.3" diameters are ideal for small animals such as rabbits, chinchillas, guinea pigs, hedgehogs, and ferrets. Knob hanging cage design maximizes space and is specially designed for small pets kept in enclosures. Food and water can be refilled from outside the cage without disassembly, promoting cleanliness and convenience. Made from safe, durable polypropylene material that withstands high-temperature washing. The dispenser can be disassembled into smaller parts for thorough cleaning and disinfection. Easy to install and helps simplify daily pet care routines. Elevated hanging design positions the feeder and water dispenser at an optimal height to support natural posture, helping to prevent neck strain when pets eat or drink. Features secure knobs that fit most standard small pet cages, allowing installation inside or outside as needed. Suitable capacity of 1 liter (35 oz) provides enough food and water for small pets for 3-5 days, making it convenient when you're away or busy. Features an automatic gravity-fed system that continuously supplies fresh water and dry food without the need for electricity, offering an eco-friendly solution for pet feeding. Equipped with a food preservation design that helps keep pet food fresh and protected from contamination, supporting overall pet health and hygiene.