NOTCH 3/4" RIGGING SPRING BLOCK Medium sized arborist block accepts working lines up to 3/4” (19mm) diameter. 30 kN WLL / 150 kN MBS Hot forged aluminum side plates with rope friendly rounded cheeks Precision CNC machined aluminum sheaves with wide bend radii Low profile,... MSRP: Was: Now: $414.99 Add to Cart