1.Made of high quality material, waterproof, dustproof, odorless and practical to use. 2.It can be used as thermal insulation in dissipating heat, reduce energy consumption of air conditioning, save fuel and make your car cooler in summer and warmer in winter. 3.Excellent sound absorption properties good vibration resistanceit can reduce ambient wind, road noise and engine noise. 4.With adhesive cotton insulation, it can be installed in any part of the car, such as doors, roofs, floors, hood, trunk room, trunk lid etc. 5.Universal fits for most car models. Specification: Product Name Car Sound Proof Insulation Foams Material Rubber + plastic Color Black Size 30cm/11.81in x 50cm/19.68in (L x W) Thickness 3mm/0.12in Typical Temperature Stability -40C to +100C Type Soundproof Cotton Quantity 9pcs Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3.There are no instruction included!Professional Installation Is Highly Recommended!!If you want to know how to use or install it,please contact us by Email.We will provide help as much as possible. Package included: 9 x 3mm Car Sound Proof Insulation Foams