we have all quality hot fixing stones in ,size 10# 12# 16# 20# in all colours ,and qualities r A,B,C,D,E a is the best quality which calls korean stones,and b in second best quality which calls taiwan stones,and C is chinese best quality D is chinese normal quality and E is cheepest quality ,,,as we export specially this stones to saudi arabia ,uk,canada,australia,germany,spain,turkey,so they prefere only 3 qualities A,B,C and as about pakistan ,dubai ,india,bangladesh,there also some customes want best qualities but mostly people like E quality ,we have best prices for hot fixing stones u can experience it