Package includes: 3 pack of vent bags. The vent hood is not included. Size: This vent bag are designed to fit 4inch diameter dryer vent pipe, 4inch diameter vent elbow and 4inch dryer vent hood with rain cover. Design: Made of polyester fiber mesh. The opening of the bags is sewn with loop strips which will help you quickly put these vent bags on or off the vent rain cover. Convenient to use: No other items such as string, clamp, magnets, wire or screw will be needed if you use our vent cover bags. The hook and loop fasteners would do the job. Application: Eliminate the problem of birds' nests or dryer lint dust. The lint bags can not only catch the lint but also allow proper venting. Color: Black Material: polyester Package Contents: 3pack of vent bags Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.