Medium size Pet Oxygen Cage for Cats and Dogs Suitable for pets less than 20 in long.Suitable for pets weighing less than 13 pounds. Large size Pet Oxygen Cage for Cats and Dogs Suitable for pets less than 26 in long.Suitable for pets weighing less than 30 pounds. Ryxor Pet Oxygen Mask Ryxor oxygen mask for dogs set includes five different sizes to accommodate all pets and a 7-foot oxygen tube for added convenience. With a single-piece design, this oxygen mask for pet is incredibly easy to clean and maintain, making it perfect for use by veterinarians, EMS, firefighters, and pet owners. It's compatible with any oxygen machine for dogs, ensuring versatile use across various scenarios. Ryxor Inhaler Spacer for Cats This inhaler spacer for cats and dogs includes three different-sized masks, ensuring the perfect fit for your pet. Whether your pet is a small cat or a large dog, this versatile product is designed to accommodate both. For cats under 20 lbs, the small mask is ideal, while the larger masks fit dogs of various sizes.