Product description:
- anodized aluminum profile with transparent cover (sold separately)
- available length 6m
- profile end with plastic end cap (accessories sold separately)
- dimensions: dia. 55mm

LT21-A8434-TPL1S55^6 - ALU PROFIL TOPLIGHT 1SIDE anod.
LT21310368 - TRANSPRENT COVER
LWT01ZASINTERLPCO - PLASTIC FULL END CAP

As a rule, both aluminum profiles and plastic diffusers have a positive length tolerance and can, therefore, deviate from each other by some millimeters.
Please consider linear extension with temperature variations.