Ray Box with Magnetic Base, 12V 21W Lab Supplies_Thermometers and has an inner diameter

and has an inner diameter of 3

Brass eight-piece slotted mass set totaling 1100 grams from 10 to 500 gram pieces

running as either water turbine or motor-driven pump for fluid-based energy-conversion work

this 2-input XOR gate module shows HI and LO output states with red and green LEDs and a printed reference

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

Ray Box with Magnetic Base, 12V 21W Lab Supplies_Thermometers and has an inner diameterMagnetic base anchors the metal cased unit to benches and steel boards, while variable focus produces five parallel beams that a shutter masks selectively. Ships with a 12V 21W bulb.