there are N855,K19,K38,6B,6C series cylinder linder availble. Cylinder liner N 3055099. 　 K19 3202240 4009220 . K38 3022157.　 K50 3022157. contract information: GuoSai (sales manager) ChongQing SAI KE XIN Industrial & Trading CO.,Ltd. TEL 86-23-67852357 013101213291 Fax: 86-23-67860247 Skype: frankguo222