Connecting Plate, Large Pack, galvanised steel 100 x 35 mm / 25 Stk. - - Amazon.com
ISO 7380-2 Flachkopfschrauben M8x50 mit Innensechskant und Flansch (10.9 verzinkt) mit Muttern (DIN 934) und Unterlegscheiben (DIN 125) - 18 Teile : Amazon.de: Baumarkt
Vent Systems 5" Inch Air Vent Duct Connector Flange Straight Ventilation Pipe Metal Ducting Connector Plate for Cooling Heating Ventilation System HVAC - - Amazon.com
Vent Systems 10" inch Air Vent Duct Connector Flange with Rubber Gasket. Straight Ventilation Pipe Metal Ducting Connector Wall Plate for Cooling Heating Ventilation System HVAC 250mm. - - Amazon.com
4'' Inch Duct Collar Air Tight -for Connecting Flex Ducting (Metal, 4'') - - Amazon.com