Durable Cementing Tools with Shell Ball Seat Locking Seat and Composite Rubber Stopper for Pressure Seat Sit Applications QZ ball seat Own product line:Cementing Tools Series Product number:RIGE-QZ By the shell, ball seat, locking seat composition. Lock seat and the ball seat through the pin connection, pressure seat sit, then pressure, the ball seat off, circulation re-open. Details By the shell, ball seat, locking seat composition. Lock seat and the ball seat through the