K15-SK Sand Kit for the Tsurumi NK seriesK15 SK Sand Kit for the Tsurumi NK series Model Number: K15 SK Sand Kit Tsurumi sand Kit for the NK2 15 & NK2 22 pumps: Turn your NK Series dewatering pump into a sand aggregate pump with the addition of our sand kit to your order. Our sand kit helps suspend the sand and solids that you sometimes encounter on what should have been a routine dewatering application.