20mm Single hinged cheek block. The Allen 20mm dynamic ball bearing block is simply the best designed and engineered micro block on the market. Line friendly soft contours and articulation, Stainless steel cheeks and inner bearing systems handle maximum loads, Central hole for tie-on becket.   Part Description Lengthmm Line Dia.mm Shackle Pinmm BreakLoad Kg MDL Weightgm AL-2026 Cheek block 45 2.5 - 6 4 350 115 15.3