HIGH QUALITY MATERIALThese suction cups are made of plastic, strong and waterproof, safe and durable, and not easy to yellow or deform. The suction cup is transparent in color and does not affect the overall decorative style. Strong adsorption force, soft material, no damage to the adsorption surface. The screws are made of metal, stable and reliable. KNURLED NUT These suction cups are equipped with knurled nuts, which are accessories installed on the top of the suction cups. With a screw-in design, you can simply screw the nut into the screw to hang or secure items safely and easily. EASY TO INSTALL AND REMOVE Wipe the surface of the slot target before use, then press the suction cup onto the smooth dry surface to release air, no screws or drilling required. When disassembling, simply unplug the suction cup on the edge of the suction cup and it is easily disassembled without leaving any traces. WIDE APPLICATION These suction cups are suitable for most smooth, flat and non-stick surfaces. porous, such as glass, mirrors, refrigerators, doors, metal, tiles, etc. Used to fix signs, acrylic panels, garlands, decorations and hanging crafts etc. RICH QUANTITY You will receive 6 pieces window suction cups, each suction cup has a diameter of about 453mm , small and compact, easy to carry, can meet your different hanging needs, save space and keep it tidy.