Selden S20 Single Soft Attachment Block – 20 mm Ball Bearing Block

The Selden S20 single soft attachment block is designed for lightweight and high-performance applications where minimal weight and flexibility are essential. Instead of a traditional shackle, this block is mounted using a line or soft shackle, allowing easy positioning and reduced overall rigging weight.

Equipped with a 20 mm acetal sheave and stainless steel ball bearings, the block ensures smooth rotation with minimal friction, even under dynamic loads. Its compact design makes it ideal for modern dinghy and performance yacht setups.

With a very low weight of just 9 grams, this block is perfectly suited for applications where every gram matters, without compromising strength or reliability.

Key features

• Single block with soft attachment (tie-on)
• Ultra-lightweight design (only 9 g)
• 20 mm acetal sheave
• Stainless steel ball bearings for smooth rotation
• Flexible mounting with line or soft shackle
• Designed for low friction and efficient trimming

Technical specifications

• Sheave diameter: 20 mm
• Weight: 9 g
• Safe working load: 150 kg
• Breaking load: 300 kg
• Maximum line diameter: 6 mm

Applications

• Lightweight control lines
• Dinghies and racing yachts
• Soft shackle rigging setups
• Fine trimming systems
• Weight-critical applications