how to refill a mechanical pencil

{"cid":"91176054","title":"MECHANICAL PENCIL LEAD 0.5MM HB HIGH QUALITY Best quality graphite pencil lead refill","imgUrl":"https:\/\/img.chinax.com\/nimg\/b1\/36\/56d38fd4337e59b9b4e4d6bc7d27-200x200-1.jpg","attrs":{"Brand Name":"OEM","Model Number":"m007","Minimum Order Quantity":"30000pcs","Delivery Time":"25-30days","Certification":"en71-3,astm","Place of Origin":"Zhejiang, China (Mainland)","Payment Terms":"T\/T","Supply Ability":"5000000pcs per monty","Packaging Details":"standard packing","Lead Type":"Mechanical Pencil Lead","Packing":"Plastic Tube, Plastic tube","Material":"Graphite","Length":"60mm","Diameter":"0.5mm\/0.7mm","Hardness":"2H\/H\/HB\/B\/2B\/3B\/4B"}}

{"cid":"91225539","title":"High Quality Black Mechanical Pencil Lead","imgUrl":"https:\/\/img.chinax.com\/nimg\/d2\/86\/046a9d9d3c47a84b1226e8144e20-200x200-1.jpg","attrs":{"Price":"$0.05-0.054 \/ piece","Brand Name":"KIDEA","Model Number":"KD30782","Minimum Order Quantity":"10000 pieces","Lead Type":"Mechanical Pencil Lead","Place of Origin":"Zhejiang, China","Product name":"Lead","Color":"black","Size":"60mmx0.5\/0.7mm","Material":"graphite","Key words":"pencil lead","Packing":"12pcs\/colour box, 12pcs\/colour box","Application":"School and office","Style":"Lead","Sample":"Freely Provide","Factory location":"zhejiang","MOQ":"10000pcs"}}