Stuffing box is a kind of device with accessory sealing elements used in conjunction with the polished rod to facilitate sealing of the well bore. The stuffing box we supply can fit for polished rod size as 1-1/8", 1-1/4" and 1-1/2", the connection of the stuffing box can be 2-3/8", 2-7/8", 3" LP, 3-1/2".