Use This Link To Purchase 

https://www.ebay.com.au/itm/126588754883
 
Australian Made Flexible Insulated  150mm


6 Metres Long

Used in domestic & commercial building applications

Suit to: AS4254-1995  & AS/NZS 1668.1-1998

if You also Need Metal duct Joiner:  https://www.ebay.com.au/itm/114194079229

If You also Need Y Branch 6-6-6 inch  https://www.ebay.com.au/itm/124130787695

If You also Need Duct tape :  https://www.ebay.com.au/itm/125972141950

If you Also Need floor Vent :  https://www.ebay.com.au/itm/124871643192

Ceiling round vent  https://www.ebay.com.au/itm/125246440271

Floor boots  https://www.ebay.com.au/itm/115830047341