Aluminium Mast Extension Essentials SDM Cross Pulley U-pin 45cm Unifiber UF030070070

Aluminium Mast Extension Essentials SDM Cross Pulley U-pin 45cm Unifiber UF030070070

Description:

The Unifiber Aluminium Mast Extension Essentials SDM is a robust 45 cm mast extension engineered to give windsurfers precise rig tuning and secure attachment for booms and downhaul systems. Constructed from anodized aluminium with stainless steel hardware and a low-friction cross pulley, it delivers reliable performance and corrosion resistance in marine environments. The integrated cross pulley reduces friction in the downhaul line for smoother, more efficient sail tensioning while the U-pin locking system offers quick, fail-safe mast-to-extension retention. Designed for consistent feel and durability, this extension balances lightness with strength to withstand repeated loading and harsh conditions. The compact 45 cm length provides a versatile range for tuning sail shape and power, making it suitable for a wide range of sails and riding styles. Compatible with SDM (Standard Diameter Mast) systems and common boom fittings, it integrates easily into existing rigs.

Key Features:

• Anodized aluminium body for strength, lightness and corrosion resistance
• Built-in cross pulley with low-friction bearing/bushing for smoother downhaul operation
• Stainless steel U-pin and axle for secure, durable locking and pulley support
• 45 cm length offering versatile tuning range for sail shape and power
• Designed for SDM (Standard Diameter Mast) compatibility — fits most standard masts and booms
• Compact, streamlined profile to minimize snagging and simplify rigging
• Rugged construction to withstand repetitive loading and marine exposure
• Easy installation and quick-release U-pin for fast rig changes and transport

Specifications:

Manufacturer: Unifiber
SKU: UF030070070
Material: Anodized aluminium body, stainless steel hardware, engineered composite/metal pulley components
Size/Dimensions: Extension length 45 cm; designed for SDM (Standard Diameter Mast) compatibility
Weight: Approx. 0.8–1.0 kg (lightweight construction)
Color: Anodized silver/metal finish with black pulley components
Category: Mast Extensions
Age Group: Adults
Gender: Unisex

Recommended Use:

Ideal for recreational to advanced windsurfers who need reliable, adjustable mast extension performance for freeride, slalom and wave sailing. Best suited for rigging sails where precise downhaul control and secure boom attachment are required, and performs well in coastal and open-water conditions. Pair with SDM masts, compatible booms, downhaul lines and cleats; recommended to use stainless or marine-grade rigging hardware for longevity.