| LH 16.21 | Dial Type Resistance Box Or Decade Resistance Box Single Dial, Each Dial Consist Of 10 Steps |
| LH 16.22 | Dial Type Resistance Box Or Decade Resistance Box Double Dial, Each Dial Consist Of 10 Steps |
| LH 16.23 | Dial Type Resistance Box Or Decade Resistance Box Triple Dial, Each Dial Consist Of 10 Steps |
| LH 16.24 | Dial Type Resistance Box Or Decade Resistance Box Four Dial, Each Dial Consist Of 10 Steps |