Rosineer Bamboo Pollen Storage / Sifter Base Box consists of the lid and the storage chamber with tempered glass catch tray and is held together securely with magnetic pins. The box can be used for storing and working with flower / hash or as a base box for using our sifter frames (75, 175, 275 microns; sold separately). When used together with sifters, just position your sifter frame on top of the storage chamber, add your flower to the sifter, cover with the lid, shake well to separate the pollen / hash from the larger particles and leaves, and collect the sifted material from the glass catch tray. The box can be used with one, two, or three different mesh size sifters at the same time to create various grade hash. The set comes with a credit card magnifying lens, a scraper, and a brush. The magnifying card can also be used to collect the sifted materials.