Assorted Spring Set, An assortment of 150 compression and extension springs ranging from 15 to 300 mm in length, 4 to 18 mm dia. and 16 to 32 s.w.g in wire thickness, Weight (lb): 5.7, Length (in):7.9, Width (in):7.1, Height (in):5.5
KidWind Basic Turbine Building Parts, kit includes the KidWind Hub, a wind turbine generator, and 25 dowels, Recommended for College and High School, Pk10