RK The groove seal is an O-profile seal that can be pressed into the groove for doors with a groove for the seal's fastening arrow. RK Groove seal is a thermoplastic elastomer seal (TPE) for doors. TPE is a new, modern, high quality, fully recyclable material and is easy to install. RK groove seal is very flexible and is suitable for 1 - 10 mm gaps, i.e. for all common door models. The width of the fastening arrow is 4 mm and the depth is 4.7 mm. By replacing your seals with new ones, you save on heating costs, repel insects, noise, drafts, dust, cold/heat and humidity. Check out the instructions and tips at www.tiivstysopas.fi.