Air brake hose: SAE J1402 Standard 10mm X 17mm 3/8"HL 10mm X 19mm 3/8"HL 13mm X 22mm 1/2"HL We look forward to your specific enquiries and hope to have the opportunity to work together with you in the future.!!! Rita He http://www.qdgy.cn Tel:86-532- 85779141 Fax:86-532-85760225 Email:empolder@qdgy.cn Msn:qdgy_rita@hotmail.co m QINGDAO GUOSONG MACHINERY PARTS CO.,LTD