Cubes Assorted

This kit is used to understand the concept of elasticity by students.
The kit comprises 2 wide steel springs of 4 turns 50 mm dia, 25, expandable steel springs with ends bent to form hooks, foam blocks 130 x 50 x 50 mm, one 50 gms reel of 32.S.W.G. copper wire, two 50 gms reels of 26 SWG bare copper wire, one meter length of latex rubber tubing, 4 elastic cords with eyelets and 4 soft erasures for twisting.