It is acceptable for the NH45-19T/NH35-31T exhaust pipe of 53cm~170cm specifically used for Panasonic tumble dryer dryer. It would be expanded and retracted arbitrarily, and it is very handy to put in and use. Installation method: Just put the flat end of the exhaust pipe on the flat joint that comes with the machine. (If it is a little loose, you only should wrap two rounds of standard tape on the joint of the machine, and then put the flat finish of the exhaust pipe on, and it can be tightly sealed. If you've any questions during use, you should touch us. 's online customer service~)