- Q195 wire stamping forming 2. Surface black spray treatment 3. Wear resistance, corrosion resistance, strong load-bearing 4. Material: Iron 5. Weight: about 417g/piece for 820 models, about 412g/piece for 830 models 6. Size: 820 models are about 20.8x11x12.2 cm, 830 models are about 19.5x13.5x12 cm 7. Description: 830 models include screws, 820 models do not