Each 47mm Adams suction cup has a weight loading of 3 pounds (1.36kgs).
This suction cup has a long neck with gripper nubs around it's circumference and can be used for a sign which is 3mm in thickness or for gripping inside a drilled hole of an object. If using a drilled hole, the 4 x 1mm nubs will ease back out to grip the back of the poster (see technical drawing image for dimensions).
Suction cups. Adams worlds best suction cups work better for longer. Suction Cups Direct crystal clear suction cups measure from 22mm to 85mm in diameter. Our range includes suction hooks, suction cups with screw stud and nut, suction cups with mushroom head and suction cups with bulldog clips. Buy suction cups from www.suctioncupsdirect.co.uk