b'29 mm Blocks 341 342 343About Carbo Air blocks: see feature page at beginning of this section.344 Doubles and triples feature U-Locks to hold the swivel in front/side 340 345 position, or to let it spin freely. 348346 34730 mm349 (1 3/16") 381 352371Use as becket block without the additional height of a becket.35032 mm(1 1/4")High-strength pivoting lead blocks 353 with cams are used for halyard controls on larger keelboats and as 395 396 headknockers on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same as Classic models, making upgrades easy. Cam reverses for either up or down cleating. Sheave Shackle pin Max line Maximum BreakingPartLength Weight working load loadNo. Description in mm in mm oz g in mm in mm lb kg lb kg340Single/swivel1 1/8292 5/866.9265/325/168330150454 41000341Single/swivel/becket1 1/8293 1/16781285/3245/1683301501000454 342Double/swivel1 1/8292 7/8731.8513/1655/168660299737 1625 Double/swivel/becket1 1/8293 3/8851.9543/1655/1686602991625737 343 344Triple/swivel1 1/8292 7/8732.6743/1655/1689904492000907345Triple/swivel/becket293 3/8852.7773/1655/168990449907 1 1/82000 1 1/8292 7/84.61303/1651/467503401500680 346Triple/471 Carbo-Cam**73 347Triple/471 Carbo-Cam/becket**1 1/8293 3/8854.71333/1651/469001800816 408 5/168 348Single/fixed*1 1/8291 15/1649.8233301501000454 29 349Stand-up/fixed*1 1/82 3/16561.1315/1683301501000454 350Cheek1 1/8292 1/853 6175/1683301501000454 .35290 fixed head*1 1/8292 1/16.9265/1683301501000454 52 353Traveler1 1/8293 5/892345/1683301501000454 1.2 371Clew block assembly1 1/84 7/81241.8515/168150454 293301000 381Double/fixed1 1/8292 1/8541.2345/1686601625737 299 3951 1/8293 15/161003.21/4620091650295 Pivoting lead block/468 Cam-Matic**90.7 2968 396Pivoting lead block/471 Carbo-Cam**1 1/83 15/161002.9683.71/46150650295 20 *Can be used as becket block. **Maximum working loads and breaking loads for blocks based on cam strengths.'