Features: Designed for stability and safety, these strong suction cups are perfect for securing cat hammock or window perch. The threaded suction cups and round hole design enhance grip, ensuring your pet's comfort even on smooth surfaces like glass or tiles. Made from transparent PVC, they blend seamlessly into your home while providing secure resting spot for your cat. Features -Color:Transparent -Material:PVC -Size:8.50X8.50X3.00cm/3.34X3.34X1.18in -Size:8.80X8.80X5.00cm/3.46X3.46X1.97in -Size:2.30X2.30X2.30cm/0.90X0.90X0.90in -PVC suction cup: made with strong pvc material, these cat window perch suction cups ensure durability and reliable support for your pet's comfort -Heavyduty suction: the vacuum glass suction cup design provides heavyduty suction power, securely attaching to glass windows without slipping or falling -Easy replacement: these cat perch suction cup replacements are designed for installation, making it simple to repair or upgrade your cat window hammock -Universal compatibility: the threaded suction cups fit various cat window beds, hammocks, and perches, versatile use for different pet furniture setups -Transparent aesthetic: the clear pvc suction cups blend seamlessly with your window, maintaining clean and unobtrusive look while supporting your cat's perch Package list: 8 x suction cups(circular ring) 8 x suction cups(hole)