Polyurethane oil seal 1) Hardness: 80-85A, 88A, 90A ... to national defense, mine ( metallurgy, coal, gold ), oil field, chemical, waterpower, engineering, printing, punch machinery, paper ... textile, mechanical, electronic, medical, automobile and architectural ceramic industries, etc.We hope to cooperate with more customers ... <10,<5,<3%Pictures Of Polyurethane Oil Seal Welcome your inquiry! Polyurethane ...