The rubber plug seals are in various shapes and structures. The most common and easy one is the rubber bung, it is with cone shape. Additonally, depending on the shape, position, media and other details of the hole, also the use mathod of the plug, rubber plug seal will be designed distinctive.
Jiacheng New Material (SJK) will provide the rubber plugs according to your spcific working conditions and design. It can be round, rectangular, square, triangular and any shape you need.