Festo Suction cups VAS/VASB are sturdy and reliable, and are ideal for the transport of workpieces of different weights, surfaces and shapes. With 11 suction cup diameters and 2 suction cup shapes - round and bellows design. There are 3 materials, nitrile rubber, polyurethane and silicone for use in a wide variety of applications. To suit applications with various temperature ranges and workpiece surfaces. The Silicone Suction cups are food-safe and all tubing connector sizes correspond to a holder size.