The Rutgerson BS slide system facilitates mainsail setting and recovery. The slides are made of a high-strength composite material with M10 stainless steel threads and are available for boats up to 50 feet monohull and 40 feet multihull. They are available for four profile sizes, two wheel sizes and in a high load version for most masts. Part No. Version Profile mm Length mm Wheel Ø mm Alternative to 8515-311-10 Standard 11mm 66 15.5 SM1335, A014 8515-316-10 Standard 16mm 66 15.5 HA89, A007 8515-319-10 Standard 19mm 66 15.5 HA90, A008 8515-323-10 Standard 23mm 66 15.5 HA91, A009 RU-1531-11-10 Big Wheel 11mm 66 19.5 SM1335, A014 RU-1531-23-10 Big Wheel 23mm 66 19.5 HA89, A007 RU-1535-11-10 High Load 11mm 68 19.5 SM1335, A014 RU-1535-23-10 High Load 23mm 68 19.5 HA91, A009 RU-1536-11-10 High Load + Big Wheel 11mm 68 19.5 SM1335, A014