millet16zjh Creative Optical Periscope DIY Assembly Physical Experiment Education Kids Toy 2019
millet16zjh Creative Optical Periscope DIY Assembly Physical Experiment Education Kids Toy
Employs light reflection principle to assembly a periscope, very interesting.
Specifications:
Employs light reflection principle to assembly a periscope, very interesting.
Made of high quality material with fine workmanship, great for physical experiment.
Cultivates interest and develop hand-brain cooperation ability.
With 360° rotatable lens, quick detachable and simple structure.
Ideal for physical science education, creates a lively and interesting class.
Item Type: DIY Periscope Toy
Material: Plastic
Features: DIY Assembly, Educational Toy, for Scientific Experiment, 360° Rotatable Lens
Size: 28cm x 5cm/11.02" x 1.97" (Approx.)
Notes:
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.
Package Includes:
2 x Lens
2 x Flat Mirrors
1 x Connector
2 x Lens Cones
Another product that competes with the previous one is this SE JT148RR Ring Stretcher and Reducer Increase the size of rings
Employs light reflection principle to assembly a periscope, very interesting.
Made of high quality material with fine workmanship, great for physical experiment.
Cultivates interest and develop hand-brain cooperation ability.
With 360° rotatable lens, quick detachable and simple structure.
Ideal for physical science education, creates a lively and interesting class.
Item Type: DIY Periscope Toy
Material: Plastic
Features: DIY Assembly, Educational Toy, for Scientific Experiment, 360° Rotatable Lens
Size: 28cm x 5cm/11.02" x 1.97" (Approx.)
Notes:
Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.
Package Includes:
2 x Lens
2 x Flat Mirrors
1 x Connector
2 x Lens Cones
Adjust the size of different rings with ease using the SE JT148RR Ring Stretcher and Reducer. You can increase and decrease the sizes of rings quickly and accurately. You can save time by using this product rather than adjusting the size by hand. With the stretcher (top part): you can size your ring, typically a band (not recommended for rings with prongs, as it can easily open up your prongs, making the setting of your ring loose), a small amount quickly. With the reducer (the bottom part): you can size your ring, typically a band, a small amount quickly with this reducer.
Steps:
1. Anneal your band.
2. Pickle it.
3. After placing the ring onto the stretcher rod, compare the size reading on the rod to your ring mandrel reading (all mandrel sizing is different from brand to brand so make a note of the variance if there is one).
4. Slowly push the lever until you feel resistance, at that point very gently push the lever.
5. Flip the ring over and repeat.
6. Check ring size frequently on your mandrel to avoid stretching your ring out too much.
7. Reshape if it has warping.
8. Refinish the ring.
Please note:
-If the ring has a stone, you must stop and study your stone to make sure it is compatible with this item.
-Before using the stretcher/reducer, you should anneal your ring.
-It is not recommend to make a large change in sizing. It is also not recommended to use this for rings that have stones in them because altering the size may make the setting less secure. If you use it on a ring that has a stone set, you should do so carefully, mindfully, and at your own risk.
SE is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our SE JT148RR Ring Stretcher and Reducer.
IPR Rights Notice:
Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the p ackaging.
SE is a registered trademark protected by US Trademark Law.
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