Steel Tuning Fork Pair with Wood Bases, 440Hz (One Adjustable) Plastic Labware_Plastic Beakers & Jugs 5-inch Alnico bar pair

5-inch Alnico bar pair

Hand-painted dicot root transverse section model exposes epidermis

Virtually friction-free 2-meter air track shipped with vehicles

and brush needed to outfit a chemistry or biology bench from scratch

the candy-bar form letting students break each piece into smaller magnets that retain their own north and south poles

Steel Tuning Fork Pair with Wood Bases, 440Hz (One Adjustable) Plastic Labware_Plastic Beakers & Jugs 5-inch Alnico bar pairAdjustable mass on one fork shifts its 440Hz pitch by a few hertz, producing audible beats when sounded against its fixed frequency partner on the matching wooden resonance base.