C E SMITH 60" I-Beam Post Guide-Ons Make trailering smoother, safer, and more precise with the C.E. Smith 60" I-Beam Post Guide-Ons engineered specifically for I-beam trailers and boat lifts. These guide-ons help you center your boat during loading and unloading, even in windy or low-visibility conditions, reducing stress and protecting your investment. Each post features a sturdy 1 1/2" galvanized steel upright that inserts over 40" into a non-marring 2 3/8" PVC tube, providing a durable yet gentle contact surface for your hull. The innovative two-piece mounting clamp allows for flexible installation above or below the I-beam, accommodating beams up to 4" wide with the included hardware. With up to 19" of lateral adjustment, you can fine-tune the guide-on position to suit your boat s beam and trailer setup. Sold in pairs, these guide-ons are compatible with optional LED Post Guide Lights (Model 10287704) for enhanced visibility during nighttime launches or retrievals. These guide-ons are a must-have for boaters who want smoother launches, safer retrievals, and less guesswork at the ramp.