47" 3-Wire Sonometer for Mersenne's Law Base Shape_Rectangular providing waterproof chemical-resistant splash protection

providing waterproof chemical-resistant splash protection with a smooth nonporous surface that wipes clean

Student kit for constructing a working DC motor from component parts

Simple-form Boyle's Law apparatus pairing a graduated plastic syringe on a wooden block with a weighted piston

Pack of 5 rubber pipette bulbs in 5mL capacity provides suction control for precise volumetric transfer and pipetting in laboratory applications

wooden barriers

47" 3-Wire Sonometer for Mersenne's Law Base Shape_Rectangular providing waterproof chemical-resistant splash protectionThree wire setup pairs a 100N spring balanced string, a pulley loaded weighted string, and a wrist pin string across a 720mm bridge span on a 1290 x 130 x 110mm hollow wooden sounding box.