High density polyethylene bollard post sleeves slide easily over existing NPT pipes to provide outdoor protection and reduced maintenance. Bollard post sleeves resist fading, rusting, and cracking to ensure lasting durability. Smooth surface exterior measures 64H and can be trimmed for an exact fit. Sleeves are constructed from 1/8 thick high density polyethylene material. Includes two 1W red strips for increased visibility at long distances.