Here at Inventair we carry 3 different sets of polythene bags
Small: 645mm x 1000mm = 400Ø
Medium: 812mm x 1524mm = 500Ø
Large: 965mm x 1524mm = 600Ø
If the bags are for one of our units then you require the Large size.
Inventair Dust unit = Bag size Large
All our spare parts will be sent out on a next day delivery service to ensure you are never left without the parts you need.