Two removable Fiberglass Filter Sponges and the Fan help to remove larger particles and fog effectively. * For larger crafts spraying, you can combine two spray booths to extend work space without tools. * The screws on the back of the spray booth for installing with long hose to draw the odour far away you. (long hose is available in our store.) * Save space with the retractable electric wire, you can draw it out by hand and push the wire button to take it back automatically. * The removable thick white filter sponge is preassembled in the spray booth, and the thin blue filter sponge for free use.