A 62mm long, magnetic needle made from carbon steel with a brass cup-bearing for low-friction pivoting when used with the needle stand, 52-3318. * Length 62mm * Ideal for the study of compasses and magnetic fields * Accurately balanced * Eisco type PH0816A https://elecena.pl/product/27243934/eisco-ph0816a-magnetic-needle-62mm 2024-11-12 https://elecena.pl/product/27243934/eisco-ph0816a-magnetic-needle-62mm 2025-08-11