150mm Red Connecting Lead Prong_3 Vertical section of a monocot

Vertical section of a monocot leaf enlarged 300x exposes parallel venation

stable Alnico fields and matching keepers across this bar-magnet pair give the classroom a reliable workhorse for ferromagnetism and pole-orientation demonstrations

Single open-or-closed switch on a 4mm-terminal base

Six 10 x 10cm unmounted plastic filter squares - red

and gauze-fronted object and receiving screens form this 1

150mm Red Connecting Lead Prong_3 Vertical section of a monocotUsed as the red rail partner to the 150mm black 4mm stackable lead, this insulated wire keeps polarity color coded across short branches in 4mm socket student circuits.