Tie Down High-Impact Pontoon Trailer Guide-Ons are designed for rough-water loading. Guide posts are hot dip galvanized for long life with covers made from high-impact, nonmarking molded PVC. The high-impact pontoon trailer guide posts are designed to be mounted between the pontoons. Made of 2-1/2" square, 13-gauge steel tubing. Ideal for larger pontoon boats. Mount to trailer cross members up to 2"W x 3"H. High-impact guide-ons stand 30" above cross member. All mounting hardware included. Sold in pairs.