Source 3/8" Durable Fiberglass Driveway marker with 9'' reflective tape on m.alibaba.com
FiberMarker 36 in. Orange Solid Driveway Reflectors 1/4 in. Dia Snow Stakes Driveway Markers for Roadway ( 20-Packs) W1SM143O20 - The Home Depot
FiberMarker 60 in. Driveway Markers Fiberglass Poles 5/16 in. Dia Solid Snow Poles Stakes with Reflective Tape, Orange (50-Pack) ESM5165O50 - The Home Depot