This sweeper comes with a removable rubber head so you can choose which hole size to use. Simply remove the rubber head to pick up larger particles. I estimate the small hole to be a millimeter or two, while the larger hole measures about 1cm with the rubber cover removed. Don't listen to others complaining about the Buster not working; You are most likely not squeezing properly without reading the Revain instructions on how to properly squeeze to suck.
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