Not required., Z5802GLBY0: Flex Design trims glassdraft B.Bronze., Z861SB1: 90° flat duct bend horizontal., Z861SB2: 90° flat duct L vertical., Z861SI0: Adapter round flat., Z861SI1: 90° Adapter round flat., Z861SM1: Straight tube 500 mm., Z861SM2: Straight tube 1000 mm., Z861SS1: Connector sleeve (female)., Z92WWB1X6., Z92WWI1X6: CleanAir Plus recirculation kit., Z92WWJ11: Long Life recirculation kit., Z92WWM11: Installation kit remote motor., Z92WWY8X2: Mounting kit for seamless installation., Z9302GLBY0: Flex Design seaml. glassdr+hob B.Bronze., Z93WWX1X1: Flat duct adapt.round 90° DN150 metal., Z93XXX1X1: Aluflex pipe cyl. 150.