Prospect rivers, creeks and dredge piles with this 50 inch aluminum alloy sluice box that folds down for easy travel. The 1.5 mm aluminum body stands up to rocks and hard water use while keeping total weight to about 10 lbs for one-person carry. A 13.7 inch flared opening at the top funnels water and gravel across a ribbed miner moss bed so heavier gold particles drop out and stay trapped as silt and sand wash through. Unfolded length is 50 x 9 x 2.6 in. Recommended for ages 14 and up under competent adult supervision; use only in calm, shallow water, handle the aluminum edges with care, and follow all local prospecting regulations.