b"125 mm & 150 mm BlocksAbout Black Magic Air blocks: see feature pages at beginning of this section.45 The center becket provides block B with additional stiffness for C deadending purchases.AStand-Up BlocksPart A B CNo. in mm in mm in mm106 32613 21/32934 3/162 1/457 32663 3/4951323 5/892 5 3/16 3261Kinina, 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 15/161251633/41911000499022000 623.786749979 3256Single/swivel4 15/161025437.3110581/2123/4191100049909979 12522000 Stand-up**4 15/161259 1/1623044.7212683/4110004990220009979 326119 3267 Center becket2 3/8604.813636671663 150 mm3262Single/swivel5 15/161501230564.918405/816125150003000013608 6804 3266Stand-up 5 15/1615011 1/828385.341251500068043000013608 2419 *Loop not included. See page 83. **Includes padeye. Uses hole spacing and base dimensions of 648 padeye. Maximum working load decreases at varying angles, refer to page 87. Uses hole spacing and base dimensions of 629 padeye. Maximum working load decreases at varying angles, refer to page 87.56"