HL570 FlexBox, complete installation set for flat shower trays made of steel enamel, stone, acrylic, mineral casting,... with drain opening d 90mm. Included in delivery: Shell part including building protection, 3 mounting brackets and positioning template, sealing set with integrated Flex element (blue), stainless steel cover, drain valve with installation key and siphon insert. Installation: The unfinished part embedded in the screed is integrated into the moisture seal by means of the sealing set. The flat shower tray lying on top of it is connected tightly to the flex element of the sealing set via the drain valve by snapping it into place. The flex element ensures that lateral deviations of up to 40mm (plus/minus 20mm from the center) between the shell component and the shower tray can be accommodated without any problems. According to ÖNORM B 3407 level installation possible (residual threshold up to 20mm).