- Established 1971
- Factory Code: H1
- Production Capacity: 50,000 MT/year
- Products: STR 20CV, STR 10CV
- Established 1971
- Factory Code: H2
- Production Capacity: 80,000 MT/year
- Products: STR 20, STR 10
- Established 1980
- Factory Code: H6
- Production Capacity: 45,000 MT/year
- Products: STR 20, STR 10
- Established 1988
- Factory Code: H7
- Production Capacity: 50,000 MT/year
- Products: STR 20, STR 10, STR 20CV, Mixture Rubber
- Established 1988
- Factory Code: H8
- Production Capacity: 50,000 MT/year
- Products: STR 20, STR 10
