Ronstan RF74140 – Series 75 Core Stand-Up Block (75mm)The Ronstan RF74140 Series 75 Core Stand Up Block is engineered for high load sailing applications where strength and performance are paramount. Featuring a robust 75mm sheave and a high strength alloy cheek construction, this stand up block is perfect for halyards, mainsheet systems, and backstay tensioners. Optimised for both rope and wire, its a versatile choice for racing yachts and performance cruisers. The precision engineered bearing system

Ideal for small craft

Designed for Inshore & Coastal Boating – Ideal for near-shore use

By acting as a compact sea anchor

Fits standard trailer roller brackets

It suits 60mm diameter masts and is very popular amongst Laser sailors

Minimal scrubbing required

Material: Durable polyester outer

making it ideal where a fixed lead is required and space is limited

Applications: Mooring

weather-resistant paper and delivered folded in a clear zip-lock pouch for onboard protection

and transport operators

Its corrosion-resistant stainless steel construction makes it especially suitable for harsh New Zealand marine environments