Description Warning post are common in the transportation field and indoor and outdoor places, which is a simple and economical method of queue management, and plays a good warning effect to prohibit vehicles and pedestrians from entering the area. This yellow & black plastic free standing safety bollards is made of PE material with injection molding process, which is environmentally friendly and durable, and the fillable base makes the product stand firmly on the ground even in wind and rain, so it is worth buying. Package Included 6*Yellow & Black Free Standing Safety Bollards 6*Bases 5*Chains 10*S-Hook.