Material Type:40mm or M4x10mm | Size: 8 pieces DIYexpert suction cup in 30mm or 40mm or 50mm with thread M4x6mm or M4x10mm incl. knurled nuts transparent - pack contains suction cups incl. the same number of knurled nutsCan be used quickly and universally. Removable without leaving any residue. Strong hold thanks to the soft PVC suction cup. Installation on smooth surfaces. Please clean carefully beforehand. Application examples: and Sign hanging of all kinds: office signs, signs in the bus, advertising posters and In the mobile home: for attaching light objects and In the kitchen or bathroom: as a towel holder, for attaching a soap dish in the shower cubicle | What's your idea Easy to understand, elegant, durable and innovative: This is what distinguishes products from the DIYexpert brand. Become a do-it-yourself expert. Self-made makes you happy and saves money.