CranesList Crane Addition Listing Johnson 20 Ton Three Sheave Hook Block accommodates 1/2” wire rope $3,250 CranesList ID: 506 Overview Item: Johnson 20 Ton Three Sheave Hook Block accommodates 1/2” wire rope Item Type: Hook Block Weight: Location: Northern California Price: $3,250 CranesList ID: 506 Item Fits: Notes Johnson 20 Ton Three Sheave Hook Block accommodates 1/2” wire rope, Model Number: J20T12RTB. Location Northern California Documents Documents Links OSHA Safety Regulations For Cranes In Construction All Images Click To Enlarge or Browse