Specifications include, but are not limited to: CONICAL SECTION: Shall be a highly pigmented fluorescent red-orange manufactured of 100% Poly Vinyl Chloride. It should be fused to a white PVC interliner. The wall thickness shall be a minimum of 0.075" for 28” Cones and a minimum of 0.065” for 18” Cones. The inside diameter at the top shall be a minimum of 1" for all Cones. The inside diameter of the base shall be a minimum of 10-1/2" for 28” Cones and a minimum of 7-1/4” for 18” Cones. BASE: The base shall be constructed of high density, weighted, Poly Vinyl Chloride. The bases of 28” Cones shall be a minimum of 14 inches square, weigh a minimum of 3.4 pounds and have a minimum of 8 feet at least 3/4" in height to facilitate stacking. The bases of 18” Cones shall be a minimum of 10-3/4” square, and have a minimum of 8 feet at least 3/8” in height to facilitate stacking. REFLECTIVE COLLARS: The 28” Reflectorized Traffic Cones shall come factory equipped with silver white collars of Type III, High Intensity, Reboundable-Type Sheeting. The top collar shall be six inches (6") wide with the top edge resting a minimum of three inches (3") and a maximum of four inches (4") from the top of the cone and a four inch (4") collar placed two inches (2") below the bottom of the six inch (6") collar.