Projection Screen 52 x 70" Mechanics_Force & Motion iron filings

iron filings

Wooden-base Morse code key with a black knob

5-inch jaw capacity

Highest-decade single-dial resistance box stepping from 100k to 1M ohms in 100k-ohm increments

Aluminum-bodied double-parallel pulley with two 2-inch wheels in a heavy-duty 4

Projection Screen 52 x 70" Mechanics_Force & Motion iron filingsMounted on collapsible tripods stands having adjustment. High reflectance screens which roll up on spring rollers in convenient, portable metal cases. Mounted on collapsible tripods stands having adjustment. High reflectance screens which roll up on spring rollers in convenient, portable metal cases. Size : 52 x 70"