Pneumatic Vacuum Cup Suction Cup BL-135 135MM New This item was purchased from a large business inventory reduction sale. I do not know the history of it. It is also marked, "G1" or "GI". Many of the items from this purchase turned out to be new items that were kept as spares. This unit came in a large container of these new cups that I am separating. It is new. The type of rubber material is not known. I do not know the age of this unit, but it looks fresh at this time and is very pliable and has no signs of being dried out. The center mounting hole is about 3/4" ID. I am not able to test it. It only comes with what is shown in the pictures. Q7-5