Sluice Fox Square Mini Stackable Sifting Pan. Fits on Sluice Fox modular sluice box system with square sluice adapter (sold separately). Can be nestled between two sluice boxes for easy and compact transport. Description: Stackable Design. 3.75" deep. Diameter: 6" at top, 5" at screen. Born in the rivers and mountains surrounding historic Keyesville California, Sluice Fox exists to bring portability and ease of use to every prospector, backpacker, and enthusiast in search of a durable and expandable sluice box solution.