Presco Wire Flags – 4″ x 5″ Flag on 24″ Staff – Blue (Pack of 100) Presco 4″ x 5″ wire flags on 24″ staff provide a durable, high-visibility marking solution for surveying, construction layout, utility locating, and landscaping applications . Each flag is mounted on a sturdy steel wire staff for easy ground insertion and reliable performance in a variety of field conditions. Often specified as blue wire marking flags (4 inch x 5 inch on 24 inch staff) or utility marking flags, these align with APWA utility color guidelines referenced by 811 Before You Dig , where blue indicates potable water lines . Key Features • 4″ x 5″ flag size on 24″ wire staff • Durable weather-resistant flag material • Rigid steel wire for easy ground placement • High-visibility colour for clear site marking • Supplied in bundles of 100 flags