Check Your Spool | CNTRL P Per-Spool Measured Data

Check your spool

Every spool is measured as it's made. Enter your spool number to see its real data.

Idea credit to Prusament by Prusa Research, who pioneered per-spool data. See theirs

SPOOL CP-PLA-BK-2026-0001

CNTRL P PLA · Black

Sample ✓ Within tolerance

Avg measured Ø

1.751 mm

Tolerance

±0.05 mm

Std deviation

9 µm

Measured diameter along the spool

Hover or drag to read any point

Material

PLA

Colour

Black

Nominal Ø

1.75 mm

Min Ø

1.746 mm

Max Ø

1.756 mm

Net weight

1000 g

Measured length

332 m

Batch

SAMPLE

Example data. Live lookup connects to the production line at launch. Tolerance target ±0.05 mm.

What you're looking at

Average diameter. The mean across the whole spool. Closer to 1.75 mm with a tight spread means steadier flow.
Tolerance. The window we hold it inside: ±0.05 mm.
Min and max. The thinnest and thickest points. Hover the graph to see where they fall.
Standard deviation. How much it varies overall, in microns. Smaller is steadier.
Weight and length. The actual filament on the spool, weighed and measured.

How we measure it

A laser micrometer reads the diameter many times per second as the filament is extruded, along the whole spool. The readings are recorded against the spool's number, so what you see is the real data for your exact spool.

Find a stockist