Magnetic Field Demonstrator with Long Solenoid, Acrylic Frame Lab Equipment and Supplies_Audio Visual Equipment Adjustable iris from closed to

Adjustable iris from closed to a 30mm maximum aperture inside a 3-inch black metal body

Square-topped wooden screw simple-machine model with a leverage block

Tirrill burner on a stable octagonal base adds air

3 glass beakers each holds 1000mL with low-form design and spout for large-volume chemistry and laboratory applications

Magnetic Field Demonstrator with Long Solenoid, Acrylic Frame Lab Equipment and Supplies_Audio Visual Equipment Adjustable iris from closed toLong solenoid coil of 1. 5mm copper wire on a 5 x 4. 5 x 2. 75 inch acrylic frame with 4mm sockets, exposing the cylindrical field pattern that distinguishes a solenoid from a single loop.