1. Weight: 4 rows of 52 holes about 500 grams, 3 rows of 39 holes about 400 grams, 2 rows of 24 holes about 500 grams, 2 rows of 20 holes 5.10-7.0mm about 400 grams, 2 rows of 20 holes 7.10-9.00mm about 450 Gram 2. Size: 4 rows of 52 holes about 20.5x5.8 cm, 3 rows of 39 holes about 20x4.5 cm, 2 rows of 24 holes about 20x4.5, 2 rows of 20 holes 5.10-7.00mm about 20.3x4.6 cm, 2 row of 20 holes 7.10-9.00mm about 20.2x4.6 cm 3. Material: metal tungsten steel alloy 4. Application: round gold and silver wire drawing board 5. Features: fine workmanship, clear scale, wear-resistant, corrosion-resistant, durable
