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Classroom Chime - Clear "Ding" sound can effectively concentrate students' attention
Forestone reeds are made from a special composite material: a mixture of polypropylene resin and cellulose wood fiber
Simple structure and friendly design make it easy to install and use
manufactures and sells the worlds sharpest and most color neutral ND
and it is produced and calibrated in the USA by Riverbank
Othmro Black 8mm(M8) x 50mm Thread Replacement Star Hand Knob Tightening Screws 2Pcs M8x50 audio Classroom Chime - Clear "Ding"Othmro Black 8mm(M8) x 50mm Thread Replacement Star Hand Knob Tightening Screws 2Pcs Star knob clamping finger tightening screw Description: 1. The appearance of the five pointed star is conducive to tightening, locking and adjustment. 2. Injection molding, threaded inserts are made of metal, durable and long service life. 3. Screw in design, easy to install, smooth lines, easy to rotate between finger grips. 4. Widely used in furniture, shelf
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