Yonsha's factory is located in Shanghai China. Yonsha produces PB30B one bellow suction cups/ vacuum cups. Yonsha has many PB30B suction pads/ vacuum pads on stock. Diameter: 30mm, hole diameter: 6mm, total height: 23mm. NBR, SI, SE and PU are Yonsha's standard materials. Yonsha has technicians to design rubber compounding.