UK
Flymo UltraTrim 300 (18V): strimmer line diameter
Line diameter for the Automatic-tap filament cassette head (factory head), from the manufacturer’s UK source. Use the size your manual gives for the head fitted to your tool.
Automatic-tap filament cassette head (factory head)
Answer
- 2.0 mm · Line shape not stated by the manufacturer
At a glance
| Make | Flymo |
|---|---|
| Model | UltraTrim 300 (18V) |
| Market | the UK |
| Head fitted | Automatic-tap filament cassette head (factory head) |
| Line diameter | 2.0 mm |
| Shape | Line shape not stated by the manufacturer |
| Source type | Flymo UK operator’s manual; line size and spool part numbers |
| Scope | UK · flymo.com/uk product page and manual |
| Last checked | 2026-10-20 |
Bump-feed head: tap the head on the ground to release line, as the manual describes. Do not go past the line size or length the manual gives.
Replacement part numbers
FLY114Filament cassette
Source: Flymo UltraTrim 300 operator’s manual ↗ · checked 2026-10-20
Using this record
Match three things before you buy line: the model name on the rating plate, the head fitted to the tool, and the diameter in the table above. If the head has been replaced, this record may not apply; follow the instructions of the head you now have.
If the line does not fit or keeps breaking
- Line keeps breaking: separate normal wear from a head or loading fault.
- Not sure which diameter is on the spool: measure the line you have before you buy more.
- Not sure which head you have: identify the cutting head from the tool and its manual.
- Round, twisted or square line: why shape and diameter are separate choices.
Other Flymo models in the UK
Each link opens that model’s own record, with its head, line diameter and manufacturer source.
- Flymo EasiTrim 250 (18V) · 1.5 mm
- Flymo UltraTrim 260 (18V) · 1.6 mm
- Flymo SimpliTrim 250 (18V) · 1.6 mm
- Flymo Contour 500E · 1.5 mm
- Flymo Contour XT · 1.5 mm
- Flymo Mini Trim ST · 1.5 mm
How this record was checked
The diameter and part numbers are copied from the cited page or manual, not estimated or averaged across models. The record carries the date it was last checked. Manufacturers change specifications between production runs, so confirm the rating plate and the current manual before you buy.
Same model name, different product: regional versions can differ. Match the rating plate.