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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
20 x Square
Round Brush
Beautiful smooth solid beechwood cubes in the seven colours of the rainbow
The tamperproof doors are fire rated PETG and virtually shatterproof
these books use an active
SONOMETER 3 WIRE PATTERN, Each Hand 20 x SquareA hollow, wooden, resonance box 1290 x 130 x 110mm with scales divided in millimetres between fixed bridges over which the wires are stretched. A spring balance reading 100N x 5N is fitted to one end and the tension exterted and measured can be finely adjusted by a wing nut. Another wire passes over a pulley and can be loaded as desired.
US$ 45.80
US$ 85.99
US$ 85.99
