| Name | Model | Description | Conform to standard |
| Copper Block | ZLT-JH1 | Copper Block of IEC 60695-11-4 figure 1. Ф5.5mm±0.01mm, weight:1.76g±0.01g before drilling. Material:high conductivity electrolytic C11000 | IEC60695-11-4 figure 1 |
| Copper Block | ZLT-JH2 | Copper Block of IEC 60695-11-3 figure 1. Ф9mm±0.01mm, weight：10g±0.05g before drilling. Material:high conductivity electrolytic C11000 | IEC60695-11-3 figure 1 |
| Copper Block | ZLT-JH3 | Copper Block of IEC 60695-11-5 figure A.1 4.00mm±0.01mm*6.00㎜±0.03㎜, weight:0.58g±0.01g before drilling. Material:high conductivity electrolytic C11000 | IEC60695-11-5 figure A.1 |
