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Large dump truck
100ml Capacity with Graduated Dropper
To illustrate the principle of image formation due to light rays passing through small apertures
drilling and welding
adjustable foam nosepiece
145mm Giant Large Sand Timer Safety Shoes Large dump truck145mm tall, large sand timer 80mm square base (top and bottom) prevents rolling. 30 seconds has the time value embossed on the top. Large Sand Timer 30 seconds also has Blue Color coded grains of sand. Excellent for classroom projects and purposes, Group projects, educational purposes, laboratory demonstration. If you need custom order with different sizes design, please contact us. Safely Packaged to avoid being damaged during transportation.
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