Ronstan RF55531 Orbit 55 Fiddle Block – Becket & Adjustable CleatThe Ronstan RF55531 Orbit Series 55 Fiddle Block is engineered for high performance sailing applications, offering exceptional strength to weight ratio. Featuring a 55mm main sheave and a 35mm fiddle sheave, this block accommodates rope diameters up to 10mm. Its 2 stage orbital ball bearing system ensures low friction and high load capacity, with a maximum working load of 500kg and a breaking load of 1000kg. The adjustable cleat arm allows for

Easy to install or replace

a high‑precision mast‑head wind vane ideal for yachts up to 8 metres

Fasteners: 316 stainless steel

helping prevent overflow damage

Low-profile race fit minimises bulk and hand fatigue

Material: Rotomoulded polyethylene shell

and the boat VHF

Waterproof & weather-resistant – ideal for marine environments

Size: 10 - 25kg

Water Resistant Chrome Brass Plug

6 oz)  Line Capacity (Mono) 24 lb/300 m

Specification Details Gear Ratio 6