5m Fiberglass Tape Measure with PVC Cover and Winding Handle Capacity_17mL Hand-cranked friction-wheel drive sandwiched between

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

4 inches on a 5

Spring-clipped metal frame on a mounting rod grips gratings

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

Pairs a 90 by 45mm semicircular face with 15mm thickness on a glass prism block

5m Fiberglass Tape Measure with PVC Cover and Winding Handle Capacity_17mL Hand-cranked friction-wheel drive sandwiched betweenNon 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.