b"125 mm & 150 mm BlocksAbout Black Magic Air blocks: see feature pages at beginning of this section.45 The center becket provides block with additional stiffness B for deadending purchases.CAStand-Up BlocksPart A B CNo. in mm in mm in mm32613 21/32931062 1/457 4 3/16 32663 3/4955 3/161323 5/8923261Kinina, Swan 78, 23.99 m (78.70'), Germn Frers designNautor Swan3255 3256 3262 3266 3267Sheave Shackle pin Max line Maximum BreakingPartLength Weight working load loadNo. Description in mm in mm oz g in mm in mm lb kg lb kg125 mm3255Single loop*4 15/16125616323.786743/4191100049902200099793256Single/swivel4 15/161251025437.3110581/2123/4191100049902200099793261Stand-up**4 15/161259 1/1623044.7212683/419110004990220009979 3267Center becket2 3/8604.813636671663 150 mm3262Single/swivel5 15/161501230564.918405/81612515000680430000136083266Stand-up 5 15/1615011 1/828385.3424191251500068043000013608*Loop not included. See page 81. **Includes padeye. Uses hole spacing and base dimensions of 648 padeye. Maximum working load decreases at varying angles, refer to page 85. Uses hole spacing and base dimensions of 629 padeye. Maximum working load decreases at varying angles, refer to page 85.55"