SUPL, compensator for fixed head raised floor pedestals. They are 3 DB noise reducers, from 52 DB to 49 DB.
Uptec SUPL2-3 Levelling disc in Polypropylene
Polypropylene levelling disc, for greater adjustment of the inclination of the supports.
H = mm Art. 2 SUPL 2 3 SUPL 3