Ronstan RF917 19mm Upright Block | Compact Deck-Mounted Pulley

The Ronstan RF917 Upright Block is a compact, durable 19mm pulley block designed for deck-mounted applications where consistent line alignment is critical. Its low-profile upright base and smooth-running acetal sheave make it ideal for use on dinghies, keelboats, and small yachts in systems like outhauls, vangs, and control lines.

Constructed with 316 stainless steel fittings and UV-resistant materials, the RF917 offers long-lasting performance in harsh marine environments. A go-to block for sailors who need efficient, compact rigging hardware in fixed positions.

✅ Key Features

• Ronstan RF917 – 19mm upright pulley block

• Compact design for deck or bulkhead mounting

• UV-resistant acetal sheave for smooth operation

• Stainless steel base and fixings for corrosion resistance

• Ideal for vang systems, outhauls, and control lines

• Suited for dinghies, keelboats, and light cruising yachts

• Part of Ronstan’s durable, performance rigging hardware range

Ronstan RF917 Upright Block Specifications:
Type of Block    Upright Lead
B.L. (kg)    500
M.W.L. (kg)    250
Max. Rope diameter (mm)    8
Weight (g)    20
Fastener Ø (mm)    5