Black ribbed matting is in the top hopper for fast gold ID, and a built in spray bar. In the bottom of the sluice is ribbed miner's carpet with expanded metal. The expanded metal helps keep the gold in the box and prevents rocks from knocking it loose.

The riffles and cage are aluminum. The benefits of aluminum is that it is light weight, and it is easier to use a magnet to remove the black sand build up. The sluice and hopper are made out of strong .080 gauge 5052 aircraft aluminum. Riffles are made out of .063 gauge 5052 aircraft aluminum, which is as thick as a quarter. The side rails of the riffle cage is made of 3/16" thick flat stock aluminum. Riffle cages are bolted in place.

This Mini-Recirculating Highbanker is made to fit in a plastic tub (not included). All you need to buy is the tub, a 12V lawn mower battery, and a small pail to catch the waste rock. Or just as easily use without a tub -- place the mini high banker in a stream.  Approx. shipping weight and dimensions:  15 pounds;  24x12x12.  Made in the USA!