Movable Bollards provide a portable visual barrier when an area needs temporary protection. Ideal for use when keeping traffic out of a temporarily hazardous area or area under repair. Can be used indoors or outdoors. Units are 42" high with a diameter of 5-1/2". 10" moldon-rubber wheels standard. Yellow baked-in powder-coated toughness for high visibility. Series BOL-MB-JK has a removable plastic top cap, which exposes four chain slots. Series BOL-MB-JKS has a removable bolt-on steel top cap with socket set-screw.