
HARKEN 40MM CARBO SINGLE BLOCK FIXED HEAD
40MM CARBO BLOCKS
Carbo AirBlocks® are 60% stronger and 30% lighter than Harken's Classic blocks.
The nylon-resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Sheaves spin on high-load ball bearings with fitted races for low-friction operation. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection.
Use 40 mm Carbo for jib and mainsheet systems on high-performance dinghies and for loaded control lines on small keelboats.
USE FOR:
- Main/jib sheets
- Mainsheet fine-tune
- Control lines
- Vangs
- Cunninghams
- Outhauls
SPECIFICATIONS:
- Sheave Ø 40 mm | 1-9/16 in
- Length 64 mm | 2-1/2 in
- Weight 40 g | 1.4 oz
- Maximum line Ø 10 mm | 3/8 in
- Maximum working load 220 kg | 485 lb
- Breaking load 735 kg | 1620 lb
Couldn't load pickup availability
Pickup currently unavailable at Optimist Canadians
Pairs well with
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We ship all orders within 1-2 business days. Free shipping on orders over $150 within North America. International shipping available. Our carefully packaged sailing equipment arrives ready for your next water adventure.
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Customer Support
Our team of sailing experts is available Monday-Friday, 9am-5pm EST to assist with any questions about our equipment. Contact us at support@kaoslifestyle.com or call (555) 123-4567 for personalized assistance.
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FAQ's
Find answers to common questions about our sailing equipment, maintenance tips, yacht club purchasing programs, and charter services. Visit our FAQ page for detailed information on product specifications and performance guidelines.
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Contact Us
Need specialized assistance for your sailing club or event? Our dedicated team is ready to help with custom orders, VS Buoys configurations, and charter services. Reach out directly at sales@kaoslifestyle.com for personalized solutions.

We are here to support your sailing journey
Our team of sailing enthusiasts is dedicated to providing exceptional customer service for all your sailing needs. From product recommendations to technical support, we're here to ensure you have the best possible experience on the water.
Experience the Kaos commitment to quality support:
- Expert product guidance from fellow sailors
- Fast shipping on all in-stock items
- Hassle-free returns and exchanges
- Dedicated support for club and team orders

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FAQs
Please read our FAQs page to find out more.
Where do you ship from?
We ship from Quebec Canada for most in stock orders, some order might be shipped from our mobile trailer in the United States
Where do you ship to?
We ship to all major countires where Purolator and/or Canada Post goes. You will find the shipping price at the end of the order.
What's your return policy?
We offer a 30 days money back return policy. You can find more details on our return policy. Refund Policy





