Description Description For exposed rail. This permanent, highly visible and all-weather track clearance marker tells switching crews how far they can shove a car without “fouling” converging tracks. Molded in a special, stable form of urethane Bends if struck and springs back up again. No damage to passing trains Bright yellow glossy finish — easy to see at night Low-profile — only 10” above tie. Withstands any temperature extreme -50° to +140° Can be bolted to tie in exposed rail or into concrete in flush rail.