1. Duration of use: Up to 7 days Size:1#,Large/2#,Medium/ 3#,Small

2. Length: 32cm

3. Inside diameter: 12mm

4. Inside diameter of nasal prongs: 6.0mm/5.0mm/4.0mm

5. Spacing between nasal prongs: 19mm/15mm/14mm

6. Resistance to flow @ 30LPM: 0.004kPa/0.06kPa/0.07kP

Product Overview:

Type 1:

1.Made of 100% imported medical-grade silicone.
2.The tube is soft and clear.
3.X-ray opaque line through the whole tube.
4.Clear depth marks on the tube.
5.Size: 5Fr, 6.5Fr, 8Fr.
6 Tube color: Green
7.Material: Silicone 

Picture: 

Type 2:

Made of non-tonic PVC, the tube is cleaner
X-ray opaque line for choice
Size: Fr4/5/6/8/10
Length :400/1000mm
Different sizes tubes are identified with color-coded connector

 
Picture: