b2 to m4 dental handpiece adapter

{"cid":"91217387","title":"Air Motor Stable Dental Handpiece Unit Stainless Steel Material","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/53\/a6\/a8e830de561382d31be4cd8039aa-200x200-1.jpg","attrs":{"Brand Name":"Finer","Model Number":"L-Kit02","Minimum Order Quantity":"10","Delivery Time":"5-8 working days","Certification":"CE","Place of Origin":"CN","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"2000 pcs\/ month","Packaging Details":"Plastic box","Type":"Dental Low Speed Handpiece","Instrument classification":"Class II","Noise":"Less than 65db","Color":"Blue","Spray":"inner water spray channel","Chuck type":"push button","Connector":"E- type","Air pressure":"0.25-0.3MPA","Speed":"25,000 RPM","Material":"Stainless steel"}}

{"cid":"91220204","title":"B2 M4 6 Hole Dental Coupler High Speed Handpiece Coupler","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/3b\/cf\/09cb83d3b2d77dade6681ce34a38-200x200-1.jpg","attrs":{"Brand Name":"MINNO","Minimum Order Quantity":"10PCS","Delivery Time":"5-8working days","Place of Origin":"CN","Payment Terms":"T\/T, Western Union","Name":"Quick Coupling","For":"NSK QD KAVO High Speed Handpiece Adaptor"}}

{"cid":"91222866","title":"Dental High Speed Handpiece Co-Ti Flowback Prevent Ceramic Bearing Push Button","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/55\/f0\/54a4629f3cc944c9a5bacedaf6e7-200x200-1.jpg","attrs":{"Price":"20~300USD","Brand Name":"FHJS","Model Number":"BY-114","Minimum Order Quantity":"1 PC","Delivery Time":"2-8 working days after receiving payment","Certification":"ISO","Place of Origin":"China","Payment Terms":"T\/T","Supply Ability":"1000 PCS","Packaging Details":"BOX, 1 PC\/BOX, Carton","Color":"Silver","Order No.":"M074595","Connection":"Fit into NSK\u3001QD quick coupling with 360\u00b0 rotation","Head Size":"\u03a611.2*13.6","Drived Air Pressure":"0.23~0.27 MPa","Water Spray":"3 Water Spray Water and air independent system","Bearing":"Germany original ceramic Bearing","Chuck":"High-Precision spring push button","Disinfection":"Withstand 135\u00b0C sterilization","Net weight":"45g","Warranty":"18 Months","Light":"Fiber optic","Rotation":"320000-400000 RPM"}}