Seldén Ball Bearing Blocks (BBB) have acetal ball bearings and a glass fiber reinforced disc. The sides are made of glass fiber reinforced composite.
- Series: BBB20
- Type: Single, tie-on
- MWL: 100 kg
- Breaking strength: 200 kg
- Max rope diameter: 6 mm
- Weight: 7g
- Disc: 20 mm
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