pawfly 20 pack clear suction cups 1.8 inch pvc plastic sucker without hooks for home decoration and organization pawfly pawfly 20 pack 1.8 inch clear and thick suction cups are made of soft pvc plastic which is flexible for you to adhere them easily to any smooth surface such as glass, window, metal, marble or tile etc. not suitable for wood, paint, grease stain, leakage and crevice walls. with tab to break the suction at ease when you want to release it.