Regulated Low Voltage DC Power Pack, 15V Capacity_3000mL 3A max with oxidized constantan

3A max with oxidized constantan winding and a nickel-plated phosphor-bronze sliding contact

and 38mm lens holder - an inexpensive starter platform for image-formation experiments

Designed for parallel gravity filtration

Wood-handled collecting net pairs a sturdy grip with fine mesh netting for classroom field trips and introductory entomology collection work

Heavy-duty reed switch on a demonstration base with 4mm plug connections

Regulated Low Voltage DC Power Pack, 15V Capacity_3000mL 3A max with oxidized constantanCompact regulated +15V DC power pack rated at 1 A, supplying steady low voltage current to electronics and optics circuits on student benches.