Gem Bids For Winter Route Marker, 1873 Technical Specification For Wrm Provision Of Winter Route Marker Snow Mast Wrm Aggregate 20mm Stone Aggregate To Be Crushed Rock Or Gravel 20mm Graded Confirming To Relevant Is Manufactured Sand Pp Nylone Rope 20mm Pp Poly Proplene Fibred Three Strand And Hawse Laid Rope Tested And M Per Set Rapidite Quick Setting Liquid