Description guide for plastic F joining section: 1st internal gap - 2nd external long leg - 3rd internal short legs - 4th thickness | M = metres, mm = millimetres
Plastic F profiles are often used as shadow gap to create a recess set into the surrounding wall. Also used as F joining section, soffit F trim, gap cover, end stop bead and edging trim.
F profile provides a receiving channel to hide the ends of panels.