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 4.5 - 4.05 40.0* 35x12 - 2480 x 1240 on request

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