Package of 100 Premium Micro-Lined Commercial Backpack vacuum bag designed to fit Proteam Sierra, Lil' Hummer II, Hawk Breeze, Speedster 600 Backpack vacuum cleaners. Only Micro-Lined Commercial Bags offer 100% Filtration of Dust, Pollen, Allergens, Dust Mite Debris and More, due to their 4-ply constructed bag. These bags are ideal for use in hotels, schools, office buildings, or homes with airborne allergen sensitivities. Full Money back guarantee on size, fit and quality. Dimensions of bags are: 2" Hole Diameter 12 ½ " x 6" Bag Size 6 ½ " x 4 ½ " Cardboard