Metal Pully Differential - 4-Step - 20mm, 30mm, 40mm, 60mm

• 4-step diameters: 20mm, 30mm, 40mm, 60mm
• 4" long, 3/8" diameter mounted rod
• Product is 6.75" x 3.5" x3"
• Sturdy metal construction
• Inner-gap on each pulley is 4.75mm

Eisco's 4-step metal pulley differential is ideal for classroom demonstrations of mechanical advantage. The inner-gap on each pulley is 4.75mm; while the pulley diameters are 20mm - 30mm - 40mm - 60mm. This durable metal unit has a painted black and blue finish, and is mounted on a 4 by 3/8th inch rod.