Replacement products are available from other companies as well.The profile gives a sharp line to your roof. Bousai Fit roof tiles meet the standard of *CJK products, which was established by Construction Material for Long-term Use Standardization Promotion Council in Japan, as construction materials that are easy to find replacement parts for long time. "Bousai" means "disaster resistant". CJK products are construction materials that are compatible with similar products of other companies. It means you can get replacements even if the original products are not produced any longer.