Trundle Wheel, 1 Each

The United Scientific® Trundle Wheel by United Scientific measures linear distance as it rolls, with a metered counter reading up to 99,999 meters in 0.2 m increments. A rubber edge with 1 cm markings grips varied surfaces, and the telescoping handle adjusts from 43 cm to 76 cm. Teachers use it for outdoor speed experiments, fieldwork mapping and marking out courses; a carrying case is included.