Perfect Size: Backer rod diameter 1/4'', length of about 32.8', slightly flexible can become thinner, offering ample material to meet your needs. It is denser and more flexible and durable than ordinary closed cell foam backer rods (Note: please measure the size of the gaps, so you can choose the right size. Diameter error of about +-0.3mm.) Premium Material: The rubber backer rod is made of high quality EPDM. ensuring endurance and high flexibility. It providing an efficient solution for sealing gaps and cracks Easy to Use: Just use scissors or knives to cut the foam backing rod to the required size, so as to customize it in cracks and gaps. Its soft and flexible characteristics ensure comfortable and efficient sealing Suitable for Most Cracks: The filling support rod is corrosion-resistant, elastic, soundproof, heat-insulating, not easy to break, and can be reused. The gap filler is suitable for most kinds of cracks, such as pavement cracks, wall joints and foundations, which can provide a neat surface for caulking projects. It helps create a comfortable and energy-efficient environment Wide Application: The space filler can efficiently deal with wall cracks, concrete cracks, cement cracks, asphalt cracks, driveway cracks, etc., as well as sealing seams in sliding doors, glass doors, windows, cabinets, etc. Specifications: Button Material: high quality EPDM Size: backer rod diameter 1/4'', length of about 32.8' Color: milky white Shapes: cylindrical Package Include: 32.8' Backer rod Warm Note: 1. Manual measurement, please allow slight errors on size 2. The color may exist a slight difference due to different screen displays