![Ronstan Series 55 BB Ball Bearing Orbit Block - Upright Lead [RF55171]](https://cdn11.bigcommerce.com/s-6g54mu6qkm/images/stencil/600x600/products/39958/52025/88830XL__09191.1617155425.jpg?c=2 "Ronstan Series 55 BB Ball Bearing Orbit Block - Upright Lead [RF55171]")
![Ronstan Series 55 BB Ball Bearing Orbit Block - Upright Lead [RF55171]](https://cdn11.bigcommerce.com/s-6g54mu6qkm/images/stencil/1280x1280/products/39958/52025/88830XL__09191.1617155425.jpg?c=2 "Ronstan Series 55 BB Ball Bearing Orbit Block - Upright Lead [RF55171]")
Product Overview
Series 55 BB Ball Bearing Orbit Block - Upright Lead
Features:
- Ultra Lightweight
- Low friction 2-stage Orbital ball bearing system
- Highest working load in its class
- Low profile and compact
- High performance cleating
Specifications:
- Sheave: 2-5/32"
- Max Rope: 3/8"
- MWL: 1100lb
- BL: 2200lb
- Weight: 3.2oz
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