17.50 Inch Distance from Rail to Rail Works with 1.90 Inch Outside Diameter Rails Thick Marine Grade HDPE Plastic Matches Manufacturer Numbers: 44102 Width: 4 inches Hardware NOT included This universal 17.5-inch wide commercial ladder tread is designed to fit all types of swimming pool ladders, making it a versatile and practical solution for both residential and commercial pool installations. Constructed from 1-inch thick solid marine-grade HDPE plastic, these treads are engineered to provide exceptional strength, durability, and long-lasting performance in harsh outdoor environments. Marine-grade plastic is resistant to corrosion, UV damage, and wear, ensuring that the treads withstand exposure to water, sunlight, and pool chemicals, while maintaining their structural integrity over time. To further enhance swimmer safety, these pool ladder steps feature a non-skid surface that improves traction, helping to prevent slips and falls when entering or exiting the pool. This is especially important for swimmers with wet feet or those who may have limited mobility, as it provides a stable, secure surface with every step. The non-skid design is durable, offering long-term performance even under high-traffic conditions. Compatibility and Fit: These ladder treads are specifically designed to work with standard 1.90-inch diameter pool rails, which are common in most pool installations. To ensure the correct fit, the manufacturer's standard measurement (17.5in) is the center-to-center (C to C) dimension of your rails. To further assist with your purchase, we have provided the outer measurements of the tread in the accompanying diagram, which will help you confirm that you are selecting the correct replacement tread. Our universal ladder treads are designed to fit within 1/4 inch of your actual ladder tread measurement. For uniformity and enhanced safety, it’s recommended that you replace all of your ladder treads at the same time. This will ensure that swimmers have equal footing at each stepping point, reducing the risk of tripping or misstepping on uneven treads. Replacing all treads also maintains the aesthetic consistency and overall safety of your pool ladder. Manufacturer Compatibility: This 17.5-inch commercial-grade ladder tread is a direct replacement for the following manufacturer ladder treads: - Paragon 44102 These compatible models ensure a perfect fit for your pool ladder, making it easier to upgrade or replace treads without the need for custom modifications. Ladder bolt hardware is sold separately. Be sure to order the appropriate hardware for your installation to ensure a secure and stable attachment to your pool ladder.