Description Extremely strong: our special manufacturing process allows our suction cups with knurled nut an unparalleled strong and long-lasting grip on smooth surfaces such as hallways, windows and walls or outdoors or in the bathroom Easy to install: no drilling, no screws, just clean the surface, press down and secure with a knurled nut. Product details: 25 large suction cups. The actual suction cup size is 40mm. Each cup can hold up to 2 kg. Versatile: Our suction cups can be vacuumed on all smooth surfaces such as windows and glass, ceramic tiles, plastic, formica, etc. Thanks to the vacuum effect, they have great suction power and are suitable for fixing: + hanging signs of all kinds: office signs, signs in the bus, advertising posters + in the motorhome: for fixing light objects + in the kitchen or bathroom: as a towel holder, for fixing a soap dish in the shower cubicle. Your advantages at a glance at a glance: Extremely versatile. Exceptional hold Very high absorption capacity. Quick and easy assembly.