Here's everything your class needs to obtain samples from the bottom of a pond or lake for further study in the lab. What makes this kit unique is the reusable, durable equipment provided - no flimsy throw-aways here. The Mighty Grab (TM), for instance, needs no messenger and can be operated either by hand line or with the included sampling pole. The Wash Bucket has 504 micron mesh for sorting samples to the same standards used by the professionals. We include an armored glass thermometer of high accuracy