Yonsha's factory is located in Shanghai China. Yonsha produces PF4L flat suction cups/ vacuum cups. Yonsha has many PF4L suction pads/ vacuum pads on stock. Diameter: 4mm, hole diameter: 5mm, total height: 12mm. NBR, SI, SE and PU are Yonsha's standard materials. Yonsha has technicians to design rubber compounding.