The Makita® Reusable cloth filter bag with 5.5L capacity and easy disposal of waste is designed for use with the Makita® 18V X2 LXT® (36V) Brushless 6 Litre HEPA Filter, 3-Speeds, 32mm Dia. Pipe, Backpack Dry Vacuum (DVC660, sold separately) to capture dust and debris. It installs quickly and easily for added user convenience.