Free Fall Apparatus Economy, for determination of the gravitational constant ft gft, This kit has a wooden base, 1.1m rod and a movable electro magnet, can be moved anywhere on the rod, when the ball is released the timer is triggered and stopped one the ball his landed on the base
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