Ronstan 30mm High Load Vang Block

The Ronstan S30 BB Block, HHL Single is a high-load, precision-engineered block designed for demanding sailing and marine applications where strength, durability and smooth operation are essential. Featuring a 30mm sheave and robust stainless steel construction, this block is ideal for high-performance control line systems.

Engineered with HHL (High Load) technology, the sheave and bearing race are manufactured from Grade 2205 stainless steel, delivering exceptional strength and corrosion resistance. Combined with Grade 304 stainless steel ball bearings, this ensures smooth, low-friction performance even under heavy loads. The frame and cheeks are constructed from Grade 316 stainless steel with a hard-wearing black coating for long-lasting protection in harsh marine environments.

Brand: Ronstan
Unit: Each
Sector: Marine
Sheave Size: 30mm
Max Rope Size: 6mm
Maximum Working Load: 400kg
Breaking Load: 800kg
Material: HHL Sheave & Bearing Race: Grade 2205 Stainless Steel
Balls: Grade 304 Stainless Steel
Frame/Cheeks: Grade 316 Stainless Steel with hard-wearing black coating
Warranty: 3 Years

• Ronstan Series 30 HHL single block for high-load applications
• 30mm stainless steel sheave for strength and durability
• Grade 2205 stainless steel sheave and bearing race for maximum corrosion resistance
• Grade 304 stainless steel ball bearings for smooth, efficient performance
• Grade 316 stainless steel frame and cheeks with protective coating
• Suitable for rope up to 6mm diameter
• Maximum working load of 400kg
• Breaking load of 800kg
• Ideal for high-performance sailing and rigging systems