The Step Stopper prevents water/ice and debris from accumulating in the mast step. If you store your boat deck-up on a dolly or trailer this is an easy and inexpensive way to keep the step clean and clear of water/ice. Simply insert the stopper into your mast step and there is no room for the water! MADE IN THE USA Availability: Usually ships the next business day. SFSS-500$14.95 Due to the wide variety of the size and weight of our items we will charge the actual cost of shipping in a separate charge on all orders. Please email us for a shipping cost estimate. Shipments outside the USA may have add on fees and duties by your own government. Sailing can be green! See our recycle your old sail offer Send us email