what size thermostat for immersion heater

{"cid":"91190349","title":"Explosion Proof Industrial Immersion Heater CE Certification With Thermostat","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/61\/1f\/bd67d91f1b7f69007d6bc31701c5-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"Hengye","Model Number":"new type","Minimum Order Quantity":"1 Piece\/Pieces","Place of Origin":"Jiangsu, China (Mainland)","Certification":"ISO9001, ASME, CE","Supply Ability":"60 Piece\/Pieces per Week","Packaging Details":"wooden box","Condition":"New","Type":"Immersion Heater","Power Source":"Electric","Pressure":"low and High pressure","Warranty":"2years","Power":"220---660","After-sales Service Provided":"Engineers available to service machinery overseas","Material of tank":"stainless steel,iron,carbon steel"}}

{"cid":"91149195","title":"Water Immersion Tubular Heater with Thermostat","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/b2\/c7\/77d1620fe0705b9e689a77499d99-200x200-1.jpg","attrs":{"Brand Name":"GME","Minimum Order Quantity":"50pcs","Delivery Time":"7~10 working days","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T, Western Union, MoneyGram, L\/C","Supply Ability":"100000 pcs per Month","Packaging Details":"cartons\uff0c pallet","Power Source":"Electric","Dimension":"Customized","Voltage":"12-480V","Sheath material":"Stainless Steel or Nickel","Style":"K, J,","Lead wire":"copper, , fiberglass silicon","Insulation Material":"MgO","Heating Element":"Nichrome Resistance","Screw Threads":"Available","Flange Washer":"Available","Connection":"Screw fitting"}}