Specifications: Set Contents: 4 cross-hole suction cups + 4 round ring suction cups Suction cup diameter: about 8.5cm Material : PVC Color: transparent Packing method: OPP bag Gross weight: about 0.21kg Packing size: about 14x9x9cm which can be selected according to actual needs to help fix the cat hammock. Widely Used: The cat bed suction cups are suitable for hanging ropes, wires, plastic rods and chains. It can also be applied to cat window hanging hammocks, cat window perches, cat window seats, cat window beds, etc. PVC material: the suction cups for cat bed are made of premium PVC plastic, smooth surface, safe and solid, easy to stick to the wall and windows, no residue, long time to use. Note: the data is all manual measurements, please allow 1 - 3cm error, due to the difference in light and display, there will be some color difference, depending on the physical object received.