"Specifications: Material: PE foam Thickness: 157 mil Size: 15.7 x 11.8 inches / 40 x 30 cm Pack:6/12/28/42 Shading Area: 7.7 sqft/15.5 sqft/36.1 sqft/54.2 sqft Feature: Auto sound deadening material is PE foam, its role is soundproofing and shock absorption, reduce the interference when you drive, for you to create a quiet and comfortable driving environment. Apart from automobiles, they can also be utilized in various everyday scenarios such as different fitness equipment and indoor piping. When applied to various types of equipment or piping, simply adhere and trim any excess to activate their functionality. They offer resistance to slipping and provide a certain degree of soundproofing, vibration reduction, and heat insulation. Our sound dampening foam consists of 6/12/28/42 pieces, each measuring 15.7 x 11.8 inches and covering an area of 7.7 square feet. The weight is very light, just tear the backing paper and paste it in the position you want, which is very convenient. TIPS：You can additionally lay a carpet or cushion, which not only prevents the car sound deadening mat getting dirty and extends its lifespan but also enhances its soundproofing effect, making the driving experience more comfortable."