nap length
also called pile depth
The pile/nap depth of a paint roller's pile sleeve — short (a ~4mm gloss/smooth-surface nap), medium (a ~10mm general-purpose nap) or long (a ~20mm masonry/textured-surface nap). It governs how much paint the sleeve holds and the texture it lays. It is OPTIONAL, not the class differentia (PaintRoller is class-earned by the universal `sleeve_material`, not by nap): a foam/gloss roller or a flock roller has NO meaningful nap and simply leaves this unfilled — forcing a nap value on a napless roller would be the b113 tea-strainer required-capacity kill (A3/L12). Distinct from the spine `depth` (a physical body dimension) and from `width` (the barrel/roller width in inches). Concern measurement (an ordinal pile-depth scale, axis-eligible — a roller range genuinely sold in short and long naps is a legitimate seller family).
Nap length is answered with one word chosen from the nap lengths list — the same word shared across every product that uses it.
It belongs to measurement — its measurable, physical facts.
asked by the kinds that answer it
1 kind answers it, each for a single value. The same question can be reused by unrelated kinds — one meaning, many homes.
asked by kinds that answer it
The same question can be reused by unrelated kinds — one meaning, many homes.
| kind | how many |
|---|---|
| paint roller | one |