Material: Expandable Polyethylene; Outer Diameter: 6mm / 1/4 inch; Total Length: 10m / 32.8 Feet; Package List: 1 x Backer RodAdvantage: Our Backer Rod is made from expandable polyethylene material that provides excellent resistance to water, It is also flexible, lightweight and easy to install, making it a good solution for sealing gaps and joints.Instruction: Simply insert it into gaps and joints to create a firm and stable foundation for sealants. It can be easily trimmed to the desired length using scissors or standard cutting tools.Application: Our Backer Rod is perfect for a wide range of applications, including construction, plumbing, and automotive projects. It effectively fills gaps and joints, preventing the infiltration of air, water, and dust, ensuring a tight and long-lasting seal.