Knife Switch - Single knife, double throw Hand Model Size: 60mm x 140mm x

Size: 60mm x 140mm x 170mm

Spring Balance Square Shape

Premium Quality: The Industrial & Utility Bins is made of high quality

Luminous display respiratory system

Children can create hundreds of words

Knife Switch - Single knife, double throw Hand Model Size: 60mm x 140mm xSingle knife, double throw. Size: 3. 5 x 7. 2cm. Durable plastic base knife switches that stand up during tough student use. Poles and knives are made of brass for good electrical connections. Premium Quality: This product 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 household use.