This set is for showing the most important types of lenses. They are 1.5″ (38 mm) Dia., optically true with ground glass edges. The set includes one each of concave, convex, double concave, double convex, plano concave, and plano convex lens arranged in a foam-lined wooden box.
• Sold in sets of 6

Item 3313-01W

In Stock

This set is for showing the most important types of lenses. They are 2″ (50 mm) Dia., optically true with ground glass edges. The set includes one each of concave, convex, double concave, double convex, plano concave, and plano convex lens arranged in a foam-lined wooden box.
• Sold in sets of 6

Item 3313-02W

In Stock

These top-quality aluminum alloy tuning forks are great for physics and music classes. Forks are 6″ (150 mm) to 10″ (250 mm) long with 0.28″ (7 mm) x 0.34″ (9 mm) tines, and vibrate long and loudly. These forks are useful to demonstrate the energy and vibration of sound.
• Sold in a set of 8
• Includes 1 each of the following frequencies; 256, 288, 320, 341, 384, 426.6, 480, 512 Hz
• Each is tuned within 0.05% of rated frequency
• Stamped with scale letter and frequency

Item 7020-30

In Stock

This economy aluminum tuning fork set comes in a wooden storage box. Each fork has a place in the foam lining, die-cut for easy storage. These forks are useful to demonstrate the energy and vibration of sound.
• A striking mallet with 1 hard and 1 soft end is included
• Sold in a set of 8
• Includes 1 each of the following frequencies: 256, 288, 320, 341, 384, 426.6, 480, 512 Hz

Item 7020-40

In Stock

This Concert Pitch or Physics Scale Tuning Fork Set comes in a high-quality wooden box. These equally tempered tuning forks are based upon the A note (440 Hz) above middle C (261.6 Hz). They are useful for teaching the physics of music.
• Includes a striking mallet with 1 soft and 1 hard end
• Includes 1 each of the following frequencies: C – 261.6 (7.25″ L, handle is 1.75″), D – 293.7 (7″ L, handle is 1.75″), E – 329.6 (6.75″ L, handle 1.75″), F – 349.2 (6.5″ L, handle is 1.75″), G – 392 (6.33″ L, handle is 1.75″), A – 440 (6″ L, handle is 1.75″), B – 493.9 (5.75″ L, handle is 1.75″), C – 523.2 (5.5″ long, handle is 1.75″)

Item 7020-60

In Stock

This economy aluminum tuning fork set comes in a wooden storage box. Each fork has a place in the foam lining die-cut for easy storage. These forks are useful to demonstrate the energy and vibration of sound.
• A striking mallet with 1 hard and 1 soft end is included
• Sold in a set of 13
• Includes 1 each of the following frequencies: 100, 128, 256, 288, 320, 341, 384, 426.6, 480, 512, 1024, 2048, 4096 Hz

Item 7020-50

In Stock

Use these calipers for measurement of small outside diameters, thicknesses, etc. The calipers are outfitted with a ratchet and a locknut for accurate readings. They are ideal for educational use in engineering and technical schools.
• Materials: Solid brass body with a chrome satin finish; hardened steel screw.
• Screw pitch: 0.5 mm (0.05″)
• Least count: 0.01 mm (0.001″)
• Range: Range 0-25 mm (0-1″)
• Zero adjustment calibration is possible
• Comes in a wooden storage case

Item 3436-02

In Stock