Ronstan's C Cleat (Carbon Fibre Cam Cleat) is corrosion free and designed for easy cleating and releasing of medium diameter control lines, jib sheets or mainsheets. It provides the holding power you will need without chewing up your line. The cams are made out of rigid, lightweight carbon fibre. A multi-coil spring recessed in the upper part of the cam generates near constant torque ensuring secure cleating and low line entry and exit efforts. This medium cleat is Ronstan's standard size cleat and works well with 1/8 in (3mm) to ﾽ in (12mm) line diameter. Ronstan's hole spacing matches Harken cam cleat hole spacing. This comes with blue caps.