EVA 4ID vs EVA 63id: specs compared
Updated 05 September 2026.
9.5 mm
EVA 63id wins on tube outer diameter
On tube outer diameter, EVA 63id leads: 9.5 mm versus 8 mm.
| Spec | EVA 4ID | EVA 63id |
|---|---|---|
| Designation | 4 mm ID / 8 mm OD | 6.3 mm ID / 9.5 mm OD |
| Size / thread | 4 mm inner diameter, 8 mm outer diameter double-wall EVA line | 6.3 mm inner diameter, 9.5 mm outer diameter double-wall EVA line |
| Fitting form | double-wall EVA beer / gas tubing | double-wall EVA beer / gas tubing |
| Seals on | the 8mm OD is what a Duotight 8mm or John Guest 5/16 collet grips | the 9.5mm OD is what a Duotight 9.5mm or John Guest 3/8 collet grips |
| Rating / role | low gas permeability line matched to the 8mm push-in size; fitting rated to 100 psi, tube burst well above | the 9.5mm-system line; the wider 6.3mm bore suits longer beer runs and UK 3/8 dispense |
| Tube OD | 8 mm | 9.5 mm |
Questions and answers
Which has the higher tube outer diameter, EVA 4ID or EVA 63id?
On tube outer diameter, EVA 63id leads: 9.5 mm versus 8 mm.
How do EVA 4ID and EVA 63id compare?
On tube outer diameter, EVA 63id leads: 9.5 mm versus 8 mm.