The AL-SP300 is mainly applied to 18 liters, 20 liters standard ... adjusting the position of the spindle nut. The manual gland clamp (sealing clamp) is mainly used for sealing open barrels, paint barrels ... Coopery, Can making, lubricants, paints, chemicals, petroleum, grain etc.The AL-SP300 is mainly applied to 18 liters, 20 liters standard ...