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* Approximately 2 kg (4.4 lbs) of well-graded sand or silty sand (particles cannot be uniform in size) | * Approximately 2 kg (4.4 lbs) of well-graded sand or silty sand (particles cannot be uniform in size) | ||
* Approximately 615 g (1.4 lbs) of gravel | * Approximately 615 g (1.4 lbs) of gravel | ||
* Piece of mesh screen, | * Piece of mesh or wire screen, if available | ||
* Any sharp blade | * Any sharp blade | ||