3/8 inch Fence Risers These durable nylon fence risers are the same ones used by many pontoon boat manufacturers today. When this tiny pontoon accessory is added between the railing and deck of your pontoon boat it immediately begins protecting your investment. These risers will slightly lift your railing, allowing air and water to pass under the fence. It will also eliminate pooling water on the deck of the boat which will double the life span of your carpet. 32 pontoon fence risers are included in each package.