The G962 Remote Void Ventilator is designed to connect an air brick or telescopic underfloor vent to a 4” Round Pipe or alternatively Manthorpe’s GRPA/1 Flexible Pipe. The adapter fits directly onto the bottom of the G960 or G965 Under floor Vent and can be easily cut down between the pre moulded cut lines to fit the G930 Airbrick., Manufacturer: Manthorpe Building Products