Schaefer offers two distinct Batten receptacles for this size range. Our 301 series accepts round battens up to 3/4" (19mm) and is fully adjustable. The front of the receptacle is removable for easy installation on the spar. The 301 is aluminum and hardcoat anodized for durability. The 1900 series accepts flat battens up to 22mm wide or round battens up to 16mm in diameter. The cover plate is removable for easy batten installation. Fully adjustable with an included allen wrench and guide for tension on the cover plate. The 1900 series is injection molded uv treated plastic.