81mm down the hole hammer

{"cid":"91182652","title":"3 inch Down The Hole Hammer with 1069mm Length and 81mm External Diameter for Efficient Drilling","imgUrl":"https:\/\/img.chinax.com\/nimg\/75\/bf\/1de53d534af41103b475fd53d433-200x200-1.jpg","attrs":{"Price":"$1,000","Brand Name":"SOLLROC","Minimum Order Quantity":"1","Place of Origin":"Hunan, China","Weight":"29 kg","Material":"Carburized steel","Hammer Size":"3 inch","Thread":"3'' Remet","External Diameter":"81mm","Length":"1069mm","Hole Range":"84-105mm","Air Pressure":"High Air Pressure","Working Pressure":"1.5-3.5Mpa","Impact Rate":"30HZ at 2.4Mpa","Rotation Speed":"25-40r\/min","Air Consumption":"7-14 m\u00b3\/min","Bit Shank":"SRC531","Connection Thread":"3'' Remet","Machine Type":"Drilling Tool"}}