Mechanical Stopwatch The kit includes illustrated teaching

The kit includes illustrated teaching notes describing the use of the kit as:

They have been carefully matched and individually electronically tuned for tonal clarity to their designated or physical range as marked

offering ease of handling and compatibility with different solvents

durable and practical

2 x pair of sand blocks

Mechanical Stopwatch The kit includes illustrated teachingIncluded: Stainless Steel Mechanical Stopwatch Metallic Balance Nickel Alloy Hairspring + Anchor escapement. Premium Quality: Stopwatch is made of high quality, heavy duty, stainless steel. Ideal craftmanship through and through. Can withstand high temperatures, mechanical & thermal shocks. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. If you need custom order with different sizes