1.Large diameter suitable for handling of large heavy vulnerable workpieces；
2.The soft taper lip seal is highly adaptable to workpieces with curved or uneven surfaces；
3. The 1.5-fold bellows structure can compensate the workpiece height difference and offer good buffering during contact with the workpiece；
4. With the support structure in the bottom, the handled workpiece will not be deformed permanently or broken；
5.The rubber elements and metal connecting plate are integrally formed;