(5") 127mm x 3mtr Black PVC/Aluminium Combiflex Flexible Ducting for Portable Air Conditioning Duct Extention Applications. Strong, Long Lasting PVC/ALUMINIUM Combi Flexible Ducting Kit. Note :- When installing cut to your required length and always ensure flex is fully extended with as few directional changes as possible to help with exhaust air flow .
eBay