Ray Box with Magnetic Base, 12V 21W Category_Plasticware One-ohm 5W wire-wound fixed resistor

One-ohm 5W wire-wound fixed resistor enclosed in an ABS module with 4mm sockets

sized for low-current circuit work below the 1A range where finer resolution matters more than full-scale capacity

and image-formation experiments in introductory optics

Cut-away 17-inch active volcano model reveals magma chamber

Open back reveals spine and posterior musculature while the head section preserves upper-body context

Ray Box with Magnetic Base, 12V 21W Category_Plasticware One-ohm 5W wire-wound fixed resistorMagnetic 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.