12" x 38" Compact Sluice Box with Combo MatNew Compact Combo mat sluice is a 12" X 38" Sluice Box with Combo Dream Mat. This new sluice design uses the micro mat as an indicator mat at the top of the sluice while using a shorter sluice box length for easy transportation and use. Micro Mat (top), Cape D (mid), Mini Mat (bottom). Wing nut pressure clamp made of 16 Ga. aluminum and is very sturdy. See it, catch it, and know you've caught it for good. Gold checks in, doesn't check out! This Short