Curl Back Scanning Crossbar Hooks .149,.186,.149 Dia,3" 4" 6" 9" L Fits 3/16" x 1" crossbars or 1" wire grid. Scanning Curl Back Crossbar HookHeavy-Duty .212 Diameter(use Quad-Wire, Fast Tag, R35, or metal plate label holders)3” L x .186” Dia. Galv. 1004” L x .212” Dia. Galv. 1006” L x .212” Dia. Galv. 1009” L x .212” Dia. Galv. 100