If you want to change the suction cup, this item will be your best choice. Features: Replacement of suction cups. Powerful vacuum suction cup, environmentally friendly, non-toxic, non-slip, durable. Help to hold cat’s hammock. Suitable for cat window hammock and cat window perch. Any problem, please contact our store without hesitation. Honor to serve you! Specification: Name: Suction cup Main material: PVC Color: Transparent Size: 8.58.54cm Package Information: Package size: 111116cm Package weight: 200g Plastic Packaging Packing List: 4* Suction cup 4* Bolt 4* Sticker