5m Fiberglass Tape Measure with PVC Cover and Winding Handle Capacity_17mL Spring-clipped metal frame on a

Spring-clipped metal frame on a mounting rod grips gratings

Low-voltage DC motor with a current-limiting series resistor on a demonstration base with 4mm plug connections

and gas control on natural gas for high-temperature chemistry heating applications

Hand-cranked friction-wheel drive sandwiched between clear acrylic plates

Cover-protected 10-ohm 4A single rheostat with constantan winding on a 200x56mm tube and 4mm safety socket terminals

5m Fiberglass Tape Measure with PVC Cover and Winding Handle Capacity_17mL Spring-clipped metal frame on aNon conductive, waterproof, and washable, this PVC coated fiberglass five meter tape measure is housed in a zinc coated steel case with a flush winding handle for field measurement.