Package include:The backer rod measures 1/4 x 1/4 inch and is 16.4 feet / 20 meters long. Enough length to meet your daily needs. The foam rubber support rod is easy to cut and install Square Shape:This foam gap filler has a square design that adequately fills cracks and is suitable for most gap fillings High quality material : High quality material selection: Made of EPDM rubber material, compared with foam, it does not absorb water, soft, flexible, flexible Suitable for Most Cracks: Black backer rod are suitable for most cracks, such as filling pavement and wall cracks, sealing doors and windows, as well as protecting dog ears and making ring frames Widely Used: The1/4 inch backer rodr can be applied for sealing household doors, windows, cabinets, shock absorption and noise reduction of industrial machinery and equipment, filling gaps in outdoor road surfaces, pet ear protection, and so on Package include:The backer rod measures 1/4 x 1/4 inch and is 16.4 feet / 20 meters long. Enough length to meet your daily needs. The foam rubber support rod is easy to cut and install