but when cooled the ball passes through the ring freely
When used on 4-6 volt
Size: 20" x 26" heavy paper laminated
Eyepiece Optical Magnification: 10X
✅Comes with a useful A4 background information booklet with 16 experiments linked to the QCA science curriculum for Key Stage 1
Spring Set of 4, Different Diameter / Length Skin Model but when cooled the ballSmall spring set can be ordered separately also. Set of 4. Specification A 2N M, Dia. 13, Mass 10g B 13N M, Dia. 10, Mass 10g C 22N M, Dia. 16, Mass 23g D 36N M, Dia. 16, Mass 27g E 50N M, Dia. 14, Mass 20g Premium Quality: Spring Set is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for use in professional laboratories but is an ideal choice for science classrooms and