Silicone Airline 6mm x 1 Metres 1 Metres of airline for air pumps and airstones.
Each packet supplied contains 1 metres of silicone airline. Internal diameter 4.9mm External diameter 6.0mm
1 metre of standard sized aquarium airline tubing.
If you buy multiples then of course you will receive 1 long piece
It's outside diameter is 6mm and inside is 4.9mm and its made from super soft silicone, which should last a lifetime.