anti sliding stop collar for drilling

{"cid":"91217788","title":"Easy Installation Red Stop Collar Prevents Drill Pipe Sliding In Black","imgUrl":"https:\/\/img.chinax.com\/nimg\/4c\/7d\/ab26e9b2cb4b47a326b3a34d0c57-200x200-1.jpg","attrs":{"Brand Name":"SWS","Place of Origin":"China","Usage":"Prevent Drill Pipe From Sliding","Weight":"2.5 Lbs","Color":"Black","Coating":"Zinc Phosphate","Technics":"Casting","Size":"3 1\/2","Installation":"Easy","Material":"Steel"}}

{"cid":"91191664","title":"Optimize Casing Placement Stop Collars For Drilling Operations","imgUrl":"https:\/\/img.chinax.com\/nimg\/41\/14\/4d05b5b2b7bb449408c48cbd7d24-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"ZS","Model Number":"13 3\/8\u2033 to 4 1\/2\u2033","Minimum Order Quantity":"1","Delivery Time":"15 work days","Certification":"IOS,API","Place of Origin":"China,Henan","Payment Terms":"T\/T","Supply Ability":"10000sets\/month","Packaging Details":"Metal or wooden case","Application":"Application","Core Components":"PLC, Bearing","Condition":"New","Usage":"Oilfield Drilling Equipment","Features":"API Low Pressure Filter Press","Color":"Customized","Bow Spring Force":"1000 lbs","Coupling Type":"Integral","Mandrel OD":"3.5","Material":"Carbon Steel","Product Name":"Bow Spring Centralizer","Size":"3-1\/2","Length":"7.5 inch","Yield Strength":"3000 lbs"}}