Ronstan RF51500 50mm Fiddle Block | Series 50 Stainless Sailing PulleyThe Ronstan RF51500 is a compact and high performance 50mm fiddle block, perfect for use in multi purchase systems on dinghies, keelboats, and small yachts. Featuring a split sheave design, this block allows for precise line control in tight spaces where a traditional double block setup might not fit. As part of the Ronstan Series 50, the RF51500 is built with a UV stable acetal sheave and 316 stainless steel cheeks, providing strength, smooth

Pacific Aerials extension and cable systems are designed specifically for:

Reduces fuel use by maintaining a smooth hull

This automatic ratchet block engages under load and disengages when it’s not needed—giving sailors the perfect blend of holding power and free-running responsiveness

SeaStar engine

Ideal for:

Ideal for frequently adjusted control lines where alignment matters most

Provides elevated centre support for keel alignment

long-lasting

non-marking contact and is ideal for use with aluminium or fibreglass boats

Offshore & coastal boating

Featuring a bright red light for the port (left) side and green for the starboard (right)

or marina walls