Our company is specialized in manufacture brake automatic or manual slack adjuster.It can used on lorry,trailer,and big bus.the MIDLAND NO as follows:KN44041 KN44051 KN44061 KN44071 KN47011 KN47001 KN48001 KN48031 FM02-19 and so on, if you need it,pls contact me,thank you.Peter ChenTel:086-575-8736611Fax:086-575-8736687