Foiling Mechanism and Bow Sprit Home / Online Shop / International Moth / Foil Parts / Foiling Mechanism and Bow Sprit Bias Adjuster Barrel Bias Adjuster Barrel £72.48(£60.40 excl Tax) Stock Status: In Stock Information Specifications Outer reel for bias adjuster with grooves to help grip rope. 12mm hole down centre. Will only fit on carbon bias adjuster. Product Code: MBSH6.3