- Korea Sangshin Electric Co., Ltd.
- Chip Thermistor,Chip Thermistor,Monoblock Filter,DR Filters,Chip Thermistor,LC Filters.
- Address:614-1, WOLHA-RI, SO-MYON, YONGI-GUN
- CIJ Inc.
- Smaller and lighter monoblock duplexer for repeater.
- Address:101 IT Pleax, Jangdong
- Hot & Cool, Inc.
- N2 shield,monoblock,injector,WJ999,WJ1000.
- Address:19-23, Maesan-ri, Mohyeon-myeon
1