50g Iron Cylindrical Hooked Weight Waves & Oscillation_Wave Motion Used to receive Morse code

Used to receive Morse code signals as audible clicks

Aluminum-handled collecting net swings lightweight through tall grass and air sweeps for classroom field trips and introductory entomology sampling work

75 inches long with a high-resolution scale and zero-point calibration for physics classrooms

Cast iron 500g mass carries a retractable hook for suspension from spring scales

50g Iron Cylindrical Hooked Weight Waves & Oscillation_Wave Motion Used to receive Morse codePowder coated for rust resistance, this 50 g steel cylindrical hooked weight features a top hook and bottom slot for tandem stacking during classroom physics and calibration work.