balcony and terrace drain DN50/75 with ball-joint outlet (for horizontal and vertical use), bitumen membrane d 420 mm for perfect and easy lap-joint waterproofing with bituminous membranes, frost- and drought-proof flap seal, cut-to-size plastic extension 20 - 73 mm with stainless steel frame round d 131 mm and stainless steel plate d 112 mm. Comes with lot cover.