Channelizer Drum Base, Product Type Trailguide Base, For Use With Product Type Traffic Barrels, Weight 20 lb, Color Black, Shape Circle, Material Recycled Rubber, Compatible with Series Trailboss/Trailguide, Width 22 in, Inside Diameter 23 1/2 in, Installation Method Slip-On, Length 22 in, Outside Diameter 24 in, Height 2 in, Standards NCHRP-350