This strong, 3-inch Alnico (Aluminum-Nickel-Cobalt) bar magnet is a must for science projects, and works very well for classroom demos; due to its larger size and colorful features, students from across the room will be able to clearly see it being used during demonstrations. Comes with marked North and South poles.

Features:

Size: 75mm L x 15mm W x 10mm Th

Composed of Aluminum, Nickel, and Cobalt (AlNiCo)

North and South poles 

Colorful Blue/Red Color