thickness (t) height (h) app. open area app. kg/m2 app. min. grid (p) diameter single relief waterflow direction std. width x length max. width x length
mm mm % mm mm mm mm
1.5 6.3 - 4.05 50.0* 17.5 - 2480 x 1240 or 1980 x 990 on request

*The grid (p) is fixed on this measure.