Single line reef, upgrade kit for 2 SLR reef. Complete kit. For Seldén B171 boom section (-2008) Jaw/Jaw The sheave house is articulating

The sheave house is articulating and stabilized by two stainless springs and the sheet sheaves are V-shaped ø60 mm machined aluminium wheels on Torlon ball bearings

Boom Track: T-19

The BBB25 Double Becket Block is a 25mm high load ball bearing block designed for dynamic loads on smaller boats

Upper block: 404-101-12

J-min: 3700 mm

Single line reef, upgrade kit for 2 SLR reef. Complete kit. For Seldén B171 boom section (-2008) Jaw/Jaw The sheave house is articulatingUpgrade from slab reef to the convenience of Single Line Reefing. This kit is for B171 booms made prior to 2008. Check the article number of your boom end (aft part). If it is 500 016 this is the right kit for your boom. Instant reefing with Single Line Reef Single Line Reef is made practical and reliable by Seldn. All you do is ease off the halyard to premarked reefing points and then haul in on the reefing line. The luff and the leech are reefed at