Boating Boat Trailer Accessories, Boating & Sailing, CE Smith, Sports & Fitness, Sports & Outdoors CE Smith Trailer Post Guide-On with Unlighted Posts- Replacement Parts and Accessories for your Ski Boat, Fishing Boat or Sailboat Trailer Review by HoneyBeetle February 2, 2019 No Comments CE SMITH 40″ PVC POST GUIDE ON 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 strength