12 Series Fiddle Block with Becket and UC Ball bearing sheaves. Powerful aluminum sheaves run on Nomex(tm)/Teflon(tm) composite bearing and twin ball bearing races for maximum thrust load capacity. Works with 120-45-UC for a powerful 4:1 system. Stainless Steel cheeks are reinforced for high loads. Swivel head "D" Shackle may be locked in place. Bolted construction allows for disassembly and proper maintainence. Removable becket allows for use of pre-spliced line. Sheave Dia. 4" (102mm), Thickness 1 1/2" (38mm), Width 4" (102mm), Length 11 9/32" (286mm), SWL 5000 lbs (2270kg), Weight 4lbs 1oz (1.84kg), Max Line 3/4" (19mm)