Selden S40+ Single Soft Attachment Block – 40 mm Ball Bearing Block

The Selden S40+ single soft attachment block is the heavy-duty upgrade within the S40 range, designed for applications where higher loads and durability are required without sacrificing flexibility or weight.

This block is mounted using a Dyneema line or soft shackle instead of a traditional metal shackle. This soft attachment system reduces weight, improves articulation and ensures optimal load alignment, making it highly effective in dynamic sailing conditions.

The upgraded S40+ version offers significantly higher working and breaking loads compared to the standard S40 block. Combined with a 40 mm sheave and stainless steel ball bearings, it delivers smooth rotation with minimal friction, even under continuous and higher loads.

With its robust yet lightweight construction, this block is ideal for performance dinghies, sportboats and smaller yachts requiring reliable load handling.

Key features

• Single block with soft attachment (tie-on)
• S40+ version with increased load capacity
• 40 mm sheave for efficient rope handling
• Stainless steel ball bearings for smooth operation
• Flexible mounting with Dyneema or soft shackle
• Designed for higher and continuous loads

Technical specifications

• Sheave diameter: 40 mm
• Weight: 63 g
• Safe working load: 400 kg
• Breaking load: 800 kg
• Maximum line diameter: 10 mm
• Block type: single soft attachment

Applications

• High-load control lines
• Mainsheet and trimming systems
• Vang, cunningham and cascades
• Dinghies, sportboats and small yachts
• Performance rigging with soft shackles