http://harkenstore.com/uniface.urd/SCCYSPW1

***From Harken Website

We designed our 75 mm Carbo AirBlocks for speed. Made of high-strength engineering plastics, the single weighs in at a very light 6.9 oz (195 grams) - including the shackle. Doubles and triples aren't much more! The strength-to-weight ration on these blocks is extremely high. They are the first all-plastic blocks with a safe working load of 1,200 lbs.

*** End Harken web site



Note: the last sentence "First All-Plastic Blocks "



I wonder why they would not want to advertise that there is carbon in them? In fact when I do a search for "carbon" on their web site, I only find reefing and furling systems for much bigger boats.... I don't understand? Sam, am I looking at the wrong blocks?



Thanks

Bob O

Tiger 852