12-Piece Delrin Density Cylindrical Bars Set with Wooden Storage Protective Collar_None Universal silicon collet is provided

Universal silicon collet is provided to accept firmly all standard pipettes up to 50 ml comfortable grip

For meteorology and atmospheric science investigations

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

showing the inverse resistance-vs-temperature relationship through any standard ohmmeter circuit

Adjustable-vibrator induction coil producing a 30mm spark from a 6-12V DC input

12-Piece Delrin Density Cylindrical Bars Set with Wooden Storage Protective Collar_None Universal silicon collet is providedBlack Delrin plastic cylindrical bars in a 12 piece set at identical 0. 5 inch diameter with varying lengths, housed in a wooden storage block for density versus volume graphing.