Harken T18 Carbo Single Block

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This tough little soft attach is lighter than a small standard metal shackle. It ties, splices, or lashes anywhere, including tight spaces.

The 18 mm block accommodates lines up to 5 mm (3/16") and includes 1 meter (3.28 ft) of 1.8 mm (1/16") Dyneema® for lashing. The T18 bearings and inner race are made with 316 stainless steel while the fiber-reinforced nylon resin sideplates reduce weight.

Control lines and take ups on dingies, skiffs, and beachcats, especially downhauls, outhauls, and other systems where very small blocks are required.


  • 7.2 grams 20% lighter weight and 10% smaller than comparably sized blocks.
  • MWL: 125 kg
  • Soft attachments allows block to articulate and align with the load, ties or splices to almost anything.
  • Line routes through the block head and sheave reduces load on sideplates.
  • Max line size 5 mm (3/16 in).

Fiber-reinforced, nylon resin sideplates for strength. Integrated inner race and rivits are 316 stainless steel. High wear composite sheave is impact resistant.

Sheaves spins on stainless steel ball in captive grooved race for an optimal strength to weight ratio in very small package.

A length of 1.8 mm (1/16 in ) line is included.

The simple construction requires no lubrication. Blocks flush clean with fresh water.


  • Description: Single
  • Sheave: 23/32" - 18 mm
  • Length: 1 1/8" - 28 mm
  • Weight: .25 oz - 7.2 g
  • Max line: 3/16" - 5 mm
  • Maximum load: 275 lb - 125 kg
  • Breaking load: 992 lb - 450 kg


The Sydney-to-Perth rail link is currently closed due to heavy rain and flooding. The Melbourne-to-Adelaide rail link is also closed due to damage caused by a train derailment.

This situation is causing extended delays of deliveries to Western Australia for the following shipping services:

- Australia Post eParcel - Regular
- TNT Road

If you need an order in Western Australia urgently, consider using  the "Australia Post eParcel - Express" service if it is available for your order. Alternatively contact our WA MAIL ORDER DEPARTMENT to discuss options based on stock already available in WA.


Australia Post and our Commercial Couriers are expecting the festive season to be extra busy this year. Based on their advice, we cannot guarantee orders placed after the cut-off dates listed below will be delivered by Christmas.

To avoid disappointment place your Christmas orders as early as possible.

State Regular Express
ACT 11th Dec 15th Dec
NSW 11th Dec 15th Dec
NT   5th Dec 11th Dec
QLD 11th Dec 15th Dec
SA 11th Dec 15th Dec
TAS 11th Dec 15th Dec
VIC 11th Dec 15th Dec
WA   1st Dec 11th Dec


Overseas, offshore islands and distant mainland locations may take up to 3 or 4 weeks to deliver. Please contact your local Mail Order Department to discuss specific details relating to your situation.


All orders are shipped from our Brookvale, Sydney order fulfilment centre. Orders are normally shipped within 5 business days - most quicker!

Shipping day estimates after your order leaves our fulfilment centre in Sydney are based on Australia Post domestic delivery times:

 State   Regular
 ACT   2 - 3 business days   1 - 2 business days
 NSW   2 - 4 business days   1 - 3 business days
 NT   4 - 13 business days   3 - 5 business days
 QLD   3 -12 business days   2 - 4 business days
 SA   3 - 5 business days   2 - 4 business days
 TAS   4 - 8 business days   2 - 4 business days
 VIC   3 - 5 business days   2 - 3 business days
 WA   5 - 10 business days   2 - 6 business days

Last updated 12/09/2023

* These delivery times are an estimate and actual delivery times may vary based on peak periods and other external factors. Bulky orders may take longer.

Shipping rates are automatically calculated based on live quotes supplied by our shipping partners. The quote takes into consideration, the bulk of your cart, where you want it delivered and if you want express or standard shipping.

Get a shipping rate estimate by adding items to your online cart. Go to the cart by clicking on the shopping cart icon located at the top right of the page. Then enter your shipping destination information into the "Estimate Shipping and Tax" section of the shopping cart summary.

International Shipping

We are currently unable to deliver online orders outside of Australia.

If you are located outside of Australia and wish to place an order offline. Please contact our Mail Order department or send us an enquiry via the orange help bubble located at the bottom right of this page.



Online purchases can be returned/exchanged within 30 days. Some exclusions do apply.

Visit our Returns Policy page for details on how you can return an item.