Schaefer Traveler Track is extruded from thick walled aluminum, allowing the track to maintain dimensional stability and structural integrity better than thinner designs - even when subjected to bending or compound curves.¥ Suitable for boats up to 50 ft with end boom sheeting¥ Suitable for boats up to 32 ft with mid-boom sheeting¥ Black hardcoat anodized for maximum corrosion resistance¥ Teflonª impregnated to reduce rolling friction, and extend the life of the anodizing¥ Uses 1/4" fasteners on 2" centers, countersunk to serve as optional stop pin holes¥ Dimensions: 1-1/2" Wide x 1-1/2" High¥ Maximum unsupported open span for bridging is typically 32" - if span is wider, use Schaefer Bridge Track (see SCH 42-94)