Installation:
Recessed in the ground with CAS39 or 40mm diameter housing (not included), by interference via O-ring (included)
Recessed in the ground with housings with a diameter between 41mm and 45mm using ML222 springs (not included)
Recessed in wood (minimum thickness 35mm), with a hole with a diameter between 40mm and 45mm, using ML222 springs (not included)