uxcell 4pcs Rubber End Caps 38mm ID Vinyl Round End Cap Cover Screw Thread Protectors Black electronics3 Turn the black knob to

Turn the black knob to control the oxygen or gas flow from 0-10LPM

2) Key B to USB 3

97F9895BZ3

Maximum Power Input-watts: 20W

and can also be applied in air

uxcell 4pcs Rubber End Caps 38mm ID Vinyl Round End Cap Cover Screw Thread Protectors Black electronics3 Turn the black knob touxcell 4pcs Rubber End Caps 38mm ID Vinyl Round End Cap Cover Screw Thread Protectors Black Product Features Specification38mm Inner Dia, Rubber Material, Black Widely Application1. All kinds of pipe ends protection: plastic pipe, metal pipe, oil pipe, water pipe, vacuum pipe; 2 Thread protection: bolt, screw, nut thread protection Widely Application3. For shelf, fence, rail protection; 4. For furniture, chair, dining table, stool, hammock decoration