[Powerful Suction] 6 black PVC suction cups with M6 screws and locknuts feature a strong adhesive design that securely attaches to smooth surfaces such as glass, walls, doors, porcelain, and car windshields. Each cup has a weight capacity of 2.2 lbs. [Thick and Sturdy] Measuring 5.5 x 2.85 cm (2.16 x 1.1 inches), these thickened suction cups are more durable than standard models, providing long-lasting stability and reliability. [Screw Fixation] Each heavy-duty suction cup includes a screw and threaded insert for easy installation in desired locations, enhancing stability, safety, and preventing items from slipping or falling. [Easy to Install] To prevent deformation and ensure optimal performance, soak the suction cups in 100C hot water for approximately 6 minutes before use. Once cooled and dried, firmly press the suction pad onto a clean, smooth surface for secure installation. [Widely Used] These strong window suction pads are versatile and ideal for securing license plates inside windshields, holding car sunshades, attaching decorations to windows and walls, and hanging bathroom towels, helping improve convenience and organization. Color: Black Material: Plastic Package Contents: 6 x Black PVC Suction Cups Note: Light reflection and differences in display screens may cause slight variations in color. Measurement error allowance is +/- 1-3 cm.