# Polyethylene tubing sizes (LLDPE): 1/8 to 3/4 in and 4 to 12 mm OD × ID × wall, plus Liquiflex POE

> What are the OD, ID and wall of 1/4 inch and 3/8 inch polyethylene tubing, and what are the metric sizes?

- Category: Tri-clamp & pipe › Pipe, tube & threads
- Kind: Standard part
- Basis: Freelin-Wade polyethylene catalog pages (LLDPE inch and metric, Liquiflex POE); one maker; numbers only; pressure ratings left out
- Page: https://xemstudio.com/objects/polyethylene-tubing-lldpe-sizes/ · JSON: https://xemstudio.com/api/geometry?object=polyethylene-tubing-lldpe-sizes · Plain text: https://xemstudio.com/objects/polyethylene-tubing-lldpe-sizes/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no tolerance added.

## Notes

- Polyethylene tubing is sold by OD with the ID set by the wall; the sizes read are Freelin-Wade's linear low-density polyethylene (LLDPE) line: 1/8 in OD (0.062 ID, 0.031 wall), 5/32 (0.106, 0.025), 1/4 (0.170, 0.040), 5/16 (0.187, 0.062), 3/8 (0.250, 0.062), 1/2 (0.375, 0.062), 5/8 (0.500, 0.062), 3/4 (0.625, 0.062) and 3/4 × 0.500 (0.125 wall) in; metric 4 × 2.7, 6 × 4, 8 × 6, 10 × 8 and 12 × 9 mm. The catalog page says Freelin-Wade no longer offers low-density polyethylene (LDPE). 'Poly tubing' for drip irrigation is sold in similar ID × OD sizes: drip-irrigation-tubing-sizes.
- Liquiflex POE (polyolefin, listed separately) is 1/4 in OD × 1/8 in ID (0.062 wall) and 3/8 in OD × 0.245 in ID (0.062 wall). Each ID and wall was checked against OD − 2 × wall: the LLDPE rows agree to within 0.004 in (0.1 mm for the metric rows); the POE 3/8 in row does not quite (3/8 − 2 × 0.062 is 0.251 in against the printed ID 0.245 in), and both printed values are shown. 
- Bend radius is shown (inches, as printed) for the inch LLDPE and POE rows; the datasheet's metric bend radii are not copied (printed without units, in the text read). Working pressures at 75 °F and 150 °F and part numbers are left out. Other tubing: nylon-tubing-inch-metric-sizes, tygon-vinyl-tubing-e-3603-sizes, ptfe-fep-pfa-tubing-fractional-sizes, silicone-tube-and-fittings. No files: tubing is not drawn as a fixed shape.

## Sizes

| family | OD as listed | OD, in | OD, mm | ID, in | ID, mm | wall, in | wall, mm | bend radius, in (as printed) |
|---|---|---|---|---|---|---|---|---|
| LLDPE (inch) | 1/8 | 0.125 | 3.18 | 0.062 | 1.57 | 0.031 | 0.79 | 1/2 |
| LLDPE (inch) | 5/32 | 0.1562 | 3.97 | 0.106 | 2.69 | 0.025 | 0.64 | 1 |
| LLDPE (inch) | 1/4 | 0.25 | 6.35 | 0.170 | 4.32 | 0.040 | 1.02 | 1-1/4 |
| LLDPE (inch) | 5/16 | 0.3125 | 7.94 | 0.187 | 4.75 | 0.062 | 1.57 | 1-1/2 |
| LLDPE (inch) | 3/8 | 0.375 | 9.53 | 0.250 | 6.35 | 0.062 | 1.57 | 2 |
| LLDPE (inch) | 1/2 | 0.5 | 12.70 | 0.375 | 9.53 | 0.062 | 1.57 | 2-1/2 |
| LLDPE (inch) | 5/8 | 0.625 | 15.88 | 0.500 | 12.70 | 0.062 | 1.57 | 3 |
| LLDPE (inch) | 3/4 | 0.75 | 19.05 | 0.625 | 15.88 | 0.062 | 1.57 | 4 |
| LLDPE (inch) | 3/4 | 0.75 | 19.05 | 0.500 | 12.70 | 0.125 | 3.18 | 2.5 |
| LLDPE (metric) | 4 mm | 0.1575 | 4 | 0.106 | 2.7 | 0.026 | 0.65 | — |
| LLDPE (metric) | 6 mm | 0.2362 | 6 | 0.157 | 4 | 0.039 | 1 | — |
| LLDPE (metric) | 8 mm | 0.315 | 8 | 0.236 | 6 | 0.039 | 1 | — |
| LLDPE (metric) | 10 mm | 0.3937 | 10 | 0.315 | 8 | 0.039 | 1 | — |
| LLDPE (metric) | 12 mm | 0.4724 | 12 | 0.354 | 9 | 0.059 | 1.5 | — |
| Liquiflex POE (polyolefin, inch) | 1/4 | 0.25 | 6.35 | 0.125 | 3.18 | 0.062 | 1.57 | .75 |
| Liquiflex POE (polyolefin, inch) | 3/8 | 0.375 | 9.53 | 0.245 | 6.22 | 0.062 | 1.57 | 1.5 |

## Where the files are

- Freelin-Wade: [Polyethylene catalog pages: LLDPE inch and metric, Liquiflex POE: OD, ID, wall, bend radius](https://www.freelin-wade.com/documents/catalogs/polyethylene-catalog-pages.pdf) — web — Maker catalog; numbers only

## Questions

**What is the ID of 1/4 inch OD polyethylene tubing?**

0.170 in (4.32 mm) with a 0.040 in wall; Liquiflex POE 1/4 in OD has a 1/8 in ID (0.062 wall).

**What is 6 mm polyethylene tubing?**

6 mm OD × 4 mm ID (1 mm wall) in Freelin-Wade's metric LLDPE line.

**What is the wall of 3/8 inch polyethylene tubing?**

0.062 in (1.57 mm); ID 0.250 in (6.35 mm).

## Fits with

- [Drip irrigation tubing sizes: 1/8, 1/4 and 1/2 in poly tubing, ID x OD (0.170 x 0.250, 0.600 x 0.700 in)](https://xemstudio.com/objects/drip-irrigation-tubing-sizes/)
- [Nylon tubing sizes: inch (1/8 to 5/8 in OD) and metric (3 to 12 mm) OD × ID × wall, standard, D.O.T. and high-pressure nylon 11](https://xemstudio.com/objects/nylon-tubing-inch-metric-sizes/)
- [Tygon vinyl tubing (E-3603 / S3 E-3603): ID × OD × wall, 1/32 to 1 in ID, 1/16 to 1/4 in walls](https://xemstudio.com/objects/tygon-vinyl-tubing-e-3603-sizes/)
- [PTFE, FEP, PFA and ETFE fluoropolymer tubing: fractional sizes by ID, wall (standard, thin, lightweight) and industrial-spec ID × OD, 1/16 to 1/2 in](https://xemstudio.com/objects/ptfe-fep-pfa-tubing-fractional-sizes/)
- [Silicone tube 1 × 3 to 10 × 14 mm (ID × OD)](https://xemstudio.com/objects/silicone-tube/)
- [Push-to-connect pneumatic fittings: tube OD 4 to 12 mm and 1/8 to 1/2 in with the thread sizes offered](https://xemstudio.com/objects/push-to-connect-fitting-sizes/)