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Basically what you see here is a small air pump. It runs off 3 to 5 volts
I don’t really have much in the way of specifications, but at 5v they will completely inflate a crushed 1.5L PET bottle (so at a guess maybe like 1.3L accounting for the uncrushable base) in about 55 seconds, and will continue to inflate said bottle until it’s hard to press in at the middle of the bottle more than about 1cm. So that’s not exactly scientific but probably gives you a good idea, these are quite capable little pumps.
I do not know the provenance of these pumps, they are quite variable in their noise and current from one to the next so they may be salvaged but they don’t look used to me. I have tested them all to be sure they blow free air.
Loaded (that is, inflating something rather than just free air movement) current is between 200mA and 450mA.
Unloaded current is between 130 and 200mA, depending on voltage of course.
The higher the voltage the louder the sound, but they are not too noisy.
Excluding the nozzle, they are 5.4cm long, 3cm wide and 1.6cm thick. The nozzle OD is 3.2mm and my 3mm ID Silicone Tube fits this perfectly.
Only one way to know if it is good for your purpose, try it out.
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