Watch Dust Air Blower and Vacuuming Set for Watch Movement Parts Cleaning Dust Cleaner with Air Blower Pen for Watchmaker. Vacuuming Set for Watch glass and movement Cleaning parts dust with Air Blower Pen. This set is very simple and useful for watchemaker, Black vent pipe diameter: 6.0, By stepping on the black pedal with your feet, negative pressure can be generated to create a vacuum, and then dust can be removed from the watch glass or movement through a vacuum cleaner, By stepping on the black pedal with your foot, negative pressure can be generated to create a vacuum, and then dust can be removed from the watch glass or movement through a vacuum cleaner. However, when you step on the pedal, there will be a loud exhaust sound, which is not a leak, You don’t have to worry, this is creating a negative pressure to create a vacuum, so that the vacuum cleaner can produce suction function, It can suck out dust from the watch glass or movement. This device is relatively easy to operate. It does not require a vacuum pump, only an air compression pump is needed to complete blowing and suction. However, the amount of suction is directly proportional to the capacity of the air compression pump, Its installation is also very simple and easy to operate. Two circular aluminum alloys with a diameter of 77mm are pressed and fixed on the meter repair table with two M6 screws, The two brackets can bend freely like arms, Two counterweights ensure that the blowing and vacuum cleaners return to their original positions after use, You can use it by connecting air to the air compressor pump through a three-way connection?