Silicon Bulb Pipette Filler with 3 Pinch Valves, 54mm Science at Home_Earth Science Red LED on a demonstration

Red LED on a demonstration base with 4mm plug connections

and an 18mm attachment diameter for pulling small weights in mechanical-advantage experiments

Four-socket E10 lamp holder pre-wired in series on a hard-plastic base with two 4mm banana terminals

showing the deflection of a current-carrying wire through a fixed magnetic field via 4mm safety sockets

6v rechargeable batteries are used

Silicon Bulb Pipette Filler with 3 Pinch Valves, 54mm Science at Home_Earth Science Red LED on a demonstrationSilicon bulb pipette filler with 3 pinch valves measures 54mm diameter for controlled suction during pipetting of aggressive chemical reagents.