The BFFT design is the best choice for very thin metal sheets (0.6 - 0.8 mm) to avoid risk for dents. The cups work great on flat and uneven/curved surfaces or if level compensation is needed, for example in de-stacking applications. The inner support, made of dual hardness to eliminate risk for dent marks, gives stability and good grip during movement in any orientation. DURAFLEX® suction cups manufactured in a specially developed material that features the elasticity of rubber and wear resistance of polyurethane. The material does not leave any marks on the objects handled and has a fantastic elastic memory.