These fascinating illusion wires are seemingly never-ending. As you pull them apart they appear to be untwisting from each other, but they never come apart! Are the wires getting longer? Is it magic? • Some assembly required • Comes with instructions
This Double Plastic Pulley is made of rigid, colored plastic with deep V-grooves. It is balanced for free movement. Each pulley is about 50 mm in Dia. and is mounted in parallel mode on an aluminum strip with hooks at both ends. • Individually packed • Double
These pulleys are made of rigid, colored plastic with deep v-shaped grooves. They’re balanced for free movement and mounted in parallel mode on aluminum strips. Hooks can be found at both ends of each pulley. • Individually packed • Quadruple • 50 mm Dia.
This Single Plastic Pulley is made of rigid, colored plastic with deep V-grooves. It is balanced for free movement. Each pulley is about 50 mm in Dia. and is mounted in parallel mode on an aluminum strip with hooks at both ends. • Individually packed • Single
This Pulley Demonstration Set is perfect for testing quantitative theories involving fixed and moveable pulleys. • Comes with a Teacher’s Guide • Rectangular wooden base: 8″ L x 32″ D Includes: • 8 single pulleys • 2 triple tandem pulleys • 2 quadruple pulleys • 1 wheel and axle • 7 weight hangers • 15 slotted weights • 3 right-angle clamps • 1 spool of cord • 1 tommy bar
This stopwatch is a must for all sport and technical applications. It is designed for easy handheld use. A lanyard allows it to be worn around the neck. Features include: • 0.01 sec stopwatch • Split/lap time • Hour/minute/second display as well as day/month • Easy three button controls • Battery has pull tab to preserve battery life and is replaceable • Includes battery and lanyard
This stopwatch has 3 easy-to-use large, red buttons: LAP, ON/RESEST, and START/STOP. It comes with a clip-on feature and a lanyard for wearing around your neck. The back of the clip has a magnetic strip that attaches to metal items such as shelves or a fridge. It also has a wire to convert to a tabletop stand for flat surfaces. • Battery pull tab protection protects the battery until the timer is ready for use • Captures elapsed time to within 0.01 sec and lap time • Powered by one 357 A button battery which is included