Description

Pairs 50mm of aperture with a 200mm focal length on a convex glass surface

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

packaged in a wooden storage box

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75 inch inner

750mm Red 4mm Insulated Connecting Lead Disposable_Disposable Pairs 50mm of aperture withUsed as the red rail partner to the 750mm black 4mm lead, this insulated wire keeps polarity color coded across the mid distance between instruments and student built bench circuits.

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750mm Red 4mm Insulated Connecting Lead Disposable_Disposable Pairs 50mm of aperture with

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