PVC Post Guide-On. Adjusts Out to 13" each Side. Fits Frames up to 3"W x 4-1/4"H. 1-1/2" sq. 16 ga Pre-Galvanized Steel post Extends 18" Into 2" PVC tube for strengthWARNING: This product can expose you to chemicals including LEAD,Chromium (hexavalent compounds) which are known to the State of California to cause cancer, birth defects or other reproductive harm, and NICKEL (METALLIC),COBALT METAL POWDER,BERYLLIUM which are known to the State of California to cause cancer, and ARSENIC ,CADMIUM which are known to the State of California to cause cancer or other reproductive harm. For more information go to P65Warnings.ca.gov.