groove on plunger rod insert pump

{"cid":"91191664","title":"AISI 1045 Steel Rod Insert Pump Spray Metal Plunger","imgUrl":"https:\/\/img.ismap.com\/nimg\/f3\/34\/02c9b909e7b1bf8ac55158fe41f6-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Zhongshi","Model Number":"Tubing pump","Minimum Order Quantity":"1 set","Delivery Time":"10~15 workdays","Certification":"API, ISO, QHSE","Place of Origin":"China","Payment Terms":"L\/C, D\/P, T\/T, Western Union, D\/A","Supply Ability":"1000 SETS\/MONTH","Packaging Details":"Standard exported packing","Certificate No.":"API 11AX-0061","Plunger material":"AISI 1045 steel","Plunger coating 1":"Spray metal","Plunger coating 2":"Chrome plated","Barrel length":"10-26ft","Barrel material":"AISI 1045 steel"}}

{"cid":"91200191","title":"011057-1 FLOW direct drive plunger insert; .49\" OD of water jet cutting machine waterjet pump parts","imgUrl":"https:\/\/img.ismap.com\/nimg\/ba\/c1\/fa183f8d858926d912d50ac79d3a-200x200-1.jpg","attrs":{"Price":"USD 20","Brand Name":"WAMIT","Model Number":"011057-1","Minimum Order Quantity":"1 set","Delivery Time":"30DAYS","Certification":"CE,ISO","Place of Origin":"CHINA","Payment Terms":"L\/C, T\/T","Supply Ability":"3000 Piece\/Pieces per Month","Packaging Details":"Wooden case or carton case or your requests","Showroom Location":"Morocco, Kenya, Argentina, South Korea, Chile, UAE, Colombia, Algeria, Sri Lanka, Romania, Bangladesh, South Africa, Kazakhstan, Ukraine, Kyrgyzstan, Tajikistan, Japan, Malaysia, Australia, Egypt, Canada, Turkey, United Kingdom, United States, Italy, Franc","Core Components":"011057-1","MOQ":"1 set","Core Components:":"waterjet parts","Video outgoing-inspection:":"Provided"}}

{"cid":"91186823","title":"Oilfield 2 1\/2\" Sucker Rod Metal Plunger Tubing Pump","imgUrl":"https:\/\/img.ismap.com\/nimg\/a2\/a8\/0847d0cf2c604c368a8d7fabfe2a-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"TR Solids Control","Model Number":"TRCB","Minimum Order Quantity":"1 pc","Delivery Time":"Within 10 days after deposit","Certification":"API 11AX, ISO Certificate","Place of Origin":"Xi'an China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union","Supply Ability":"50000 pcs per month","Packaging Details":"Pallet or wooden case","Material":"Carbon Steel","Color":"Green, blue or red","Barrel Surface":"Chrome Plate, Nickel-Phosphorous Plate","Warranty":"12 months","Pump Diameter":"1 1\/4-2 1\/2\""}}