orthodontic torque spring for class ii

{"cid":"91222511","title":"16*22 S\/M\/L 17*25 S\/M\/L 19*25 S\/M\/L Dental Orthodontic Torque Spring for Class II Instrument Classification","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/86\/06c743bd63f8e72389975276c721-200x200-1.jpg","attrs":{"Price":"CN\u00a516.67\/packs 20-49 packs","Brand Name":"ALS","Model Number":"Tooth Torque Spring","Minimum Order Quantity":"20 packs","Place of Origin":"Zhejiang, China","Power Source":"Manual","Warranty":"2 years","After-sale Service":"Free spare parts","Material":"metal, Steel","Shelf Life":"2 years","Quality Certification":"ce","Instrument classification":"Class II","Safety standard":"MFDS","Size":"16*22(S\/M\/L) 17*25(S\/M\/L) 19*25(S\/M\/L)"}}