SKU: 47755449563

Single line reef, upgrade kit for 2 SLR reef. Complete kit. For Seldén B171 boom section (-2008)

Sale price$295.09 Regular price$327.88
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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16

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Description

Single line reef, upgrade kit for 2 SLR reef. Complete kit. For Seldén B171 boom section (-2008)Upgrade 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

Upgrade 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 Seldén. 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 the same time. A system of guided blocks inside the boom ensures that the lines do not tangle. The system has a 2:1 gear ratio for effortless reefing, without having to leave the cockpit.

The kit contains:

  • ø10 mm white/blue 32/3 Polyester line for reef 1. 6+ 25 m
  • ø10 mm white/red 32/3 Polyester line for reef 2. 6 + 38 m
  • 2 composite Single Line sliders that run in tracks inside the boom. 
  • 2 PBB60 Single blocks used as turning blocks and fitted to the outboard end 500-016. 
  • 2 reef shackles
  • 2 composite sheaves for your inboard boom end.
  • 1 ø10 mm x 94 mm shaft
  • 1 Outhaul slider. Runs between the two reef sliders in its own track inside the boom.
  • 28 m ø2,5 mm messenger line to pull the outhaul through the boom 
  • Instructions

 

Shipping Notes
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  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47755449563

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Kristin
Massapequa, US
★★★★★ 5
Firm but not hard
Color: Grey, Size: 4inch-Tw"
I sleep on this on the floor about 50% of the time because it’s so much more comfortable than my actual mattress. It doesn’t leave me with back or hip pain, it doesn’t sink so you never feel the ground like with an air mattress. It folds up to store under my real bed or I can fold in into a chair if I need. I did have to use a hair dryer to fluff up a few of the corners because they were taking a long time after opening but that’s to be expected.
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Reviewed in the United States on April 22, 2026
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Verified Purchase
Jane
Lake Worth, US
★★★★★ 4
Good mattress for company
Color: White, Size: S06-Single
This mattress is great for when you have a crowd coming to visit. It's easy to move around and it's pretty comfortable. I took it camping and slept well. It's not great as a chair unless you lean the back against a wall. Single bed sheets fit on it nicely.
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Reviewed in the United States on March 31, 2026
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Ethan
Battle Creek, US
★★★★★ 5
Very faint smell for two days, but did not disturb my sleep.
I am 120 lbs and this feels to me more of a medium firm foam. It is very comfortable for laying on my back, but it hurts my hips when I lay on my side for a while. The cover is nice and velvety, and looks to be sturdy. It had a slight smell for two nights, but very faint enough that I was able to sleep on it the day it was delivered. The smell never woke me up, as the smell was very faint. The foam expanded to full size all over within hours, and has no uneven places.
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Reviewed in the United States on December 9, 2025
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Michelle
Belleville, US
★★★★★ 3
MAYBE MOLDY
it’s a good little bed for if your ina pinch but it produces moisture whenever it’s in a cold room so it could attract mold eventually just a fair warning
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Reviewed in the United States on May 21, 2026
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Trish Harris
Draper, US
★★★★★ 5
Comfortable & durable.
Color: White, Size: S06-Single
Needed to take care of a family member in a small studio apartment. There was no room for a bed so I needed to sleep on the floor. I chose the narrowest twin size but found it big enough for me & I am a size 18. Very good foam, dense but soft. I've been sleeping on it daily for over 6 months & it is still comfortable. Someone else also slept on it a number of times & also found it comfortable. Very happy with this purchase.
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Reviewed in the United States on December 31, 2025

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