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Tungsten weights (fishing sinkers or fishing weight) are an ideal, environment-friendly alternative to lead weights, which are toxic and increasingly being labeled an environmental hazard. Tungsten weights are harder than steel and extremely dense, tungsten being on average 30 percent smaller than its lead counterpart.
| Quantity: | |
|---|---|
| Class | Nominal tungsten (weight percent) | Density (g/cc) | Hardness ( HRC )(maximum) |
| 1 | 90 | 16.85 - 17.25 | 32 |
| 2 | 92.5 | 17.15- 17.85 | 33 |
| 3 | 95 | 17.75- 18.35 | 34 |
| 4 | 97 | 18.25- 18.85 | 35 |
