Pack of 20 x 47mm diameter Adams suction cups with nubs.
Each 47mm Adams suction cup has a weight loading of 3 pounds (1.36kgs).
These strong Adams suction cups have a long neck with protruding nubs around their circumference. They are great for heavier posters which are 3m-4mm in thickness and where a quick fixing is preferred to using a top pilot hole suction cup with a clear screw or brass nut fitting.
The suction cup can be pushed through a drilled hole of a poster or sign and the nubs will ease back out to their original height to grip the back of the poster (see technical drawing image for dimensions).
Suction cups with nubs are also useful when fixing the neck into a solid drilled object.