These handy, leakproof bags are ideal for storing dissection specimens between lab sessions. Use the 4 × 6" size for storing Ascaris, earthworms, leeches, and grasshoppers; the 6 × 9" size for crayfish, freshwater mussels, medium perch, and grass frogs up to 4" body length; the 9 × 12" size for large starfish, extra-large perch, and medium fetal pigs; and the 12 × 15" size for giant bullfrogs, large grass frogs, and large and extra-large fetal pigs. These bags are also good for holding field-collected samples and for the storage of parts. Sold in packs of 100.