PureAClean blue, non-marking, NON ESD SAFE 1/4″ (6.35 mm) diameter vacuum cup.  The vacuum cup material is PureAClean, a catalytically cured silicone based rubber compound.  This cup material is ideally suited for handling residue sensitive items such as lenses or optical filters. 

Operating temperature limits (-65^oF – 480^oF) (-55^oC – 250^oC).

Electrical properties: Greater than 10¹³ Ohms.

Lifting capacity at 6 In Hg:   60 g (2 oz)

Lifting force is directly proportional to the vacuum level and the surface area of the vacuum cup being used .