Your Cart is Empty

⛵️ Trusted For 11 Years | 40,000+ Orders Shipped

🚚 Fast Dispatch and a 5 Star Rated Service You Can Count On ✅

Trustpilot 4.9 out of 5 rated

Harken 29mm Carbo Air Block with Removable Bolt - HSB464

Early December Sale - Ends Midnight
⚡️ Lightning fast dispatch, getting you back on the water
⮐ 90 Day Hassle Free Returns
🚚 Fast UK Delivery £4.50 or FREE if you spend over £95*
💰 Price Match Promise ✔️
✅ In stock,
2 items left
🔥 to take advantage of UK Next Day delivery with DHL
apple pay american express maestro master paypal visa


Our Guarantee

We want you back on the water as quickly as possible. We ship orders quickly, use fast postal services and show you accurate stock levels. This is why our customers rate us as 5 star.

Use our flexible payment options and take advantage of 90 day returns if you need to.


  • 29mm Harken Carbo Air Block with Removable Bolt - HSB464

    Low-friction Harken 29mm Carbo AirBlocks® from Harken are lightweight, strong, reliable and affordable.

    This 29mm block has been popular with Harken customers for many years for a range of halyard and control line systems. This variation comes with a removable bolt through the middle so it can be undone and connected to various locations on your boat.

    Please do be careful when you remove the bolt and make sure you keep both of the block sides together to ensure the ball bearings don't come out.

    This pulley block most popular with Laser sailors and can be used to attach to the deck plate at the bottom of the mast to provide an upgraded pulley system.


    • Sheave Ø - 29mm
    • Length - 49mm
    • Weight - 23g
    • Maximum line Ø - 8mm
    • Maximum working load - 150kg
    • Breaking load - 454kg

Why Sailing Chandlery?

Fast Dispatch

FAST Dispatch

Next Day Delivery Available

Next Day Delivery

5 Star Rated

5 Star Customer Rated

90 Day Returns

90 Day Returns

Price Match Promise

Price Match Promise

Questions For Us?

Get in touch with our friendly team today

Still got questions? Our friendly team are on hand to help.

Call us on 01268 222912 or drop us an email info@sailingchandlery.com