b'40 mm BlocksAbout Carbo Air blocks: see feature page at2156beginning of this section.Bacardi Invitational Winter SeriesHannah Lee NollHigh-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as headknockers on dinghies and beachcats for sheeting directly from the boom. Hole spacing and rivet size are the same as Classic models, 2157 making upgrades easy. Cam reverses for either up or down cleating. 2638 2639 2640 2641 26422643 2647 2648 2654Sheave Shackle p in Max line Maximum BreakingPa rtLength Weight working load loa dN o. Description in mminmm oz g in mm in mmlb kglbkg2156Pivoting lead block/150 Cam-Matic* **1 9/164 1/21126.61863/810300136950430 402157Pivoting lead block/365 Carbo-Cam* **1 9/16404 1/21125.51573/81020091950430 2638Double/swivel1 9/16403 11/16943.28653/8109704402380 3/161080 2639Double/swivel/becket1 9/16404 5/161103.4903/1653/810970440238010802640Triple/swivel1 9/16403 11/16944.61183/163/810145566030501383 5 2641Triple/swivel/becket1 9/16404 5/161104.71223/1653/81066030501383 1455 5 2642Double/fixed1 9/16403 1/2892.8803/163/81097044023801080 2643Double/fixed/becket1 9/164 3/161062.9843/1653/81097044023801080 40 2647Triple/swivel/471 Carbo-Cam**1 9/16403 11/16948.22323/1651/46750340150068026481 9/16404 5/161108.32353/1651/469004081800816 Triple/swivel/471 Carbo-Cam/becket** 2654Quad/swivel403 11/1694653/810145530501383 1 9/161703/16660 *Can be used as becket block.**Maximum working loads and breaking loads for blocks based on cam strengths.22'