Ronstan RF51530 50mm Fiddle Becket Block with Cleat | Series 50 Sailing PulleyThe Ronstan RF51530 is a versatile 50mm fiddle block with integrated becket and cam cleat, offering compact and efficient line handling for multi purchase systems. Ideal for vangs, outhauls, cunninghams, and other control line setups, this block combines strength, control, and convenience in one rugged package. Part of the Ronstan Series 50, it features UV resistant acetal sheaves for smooth operation, 316 stainless steel cheeks for marine grade

the RF51151 features a UV-resistant acetal sheave and 316 stainless steel cheeks for exceptional strength and long-term resistance to corrosion

flared top

Part of the Ronstan Series 55 block range

cost-effective way to restore faded gelcoat without expensive polishing equipment

Gel formula clings to vertical surfaces for better performance

Lightweight (~42g)

Red hand flares are one of the most important final-stage distress signals

offshore passage-making

“Pre-terminated”

Manufactured using durable marine-grade RG58A/U coaxial cable with UV-resistant outer sheathing

low-friction performance under load

The becket provides a convenient tie-off point in multi-purchase control systems