Home > Products > Exterior Trim > Exterior Trim > Flextrim Flat Stock FlexTrim moulding is hard yet flexible. Allows you to add more curve to your mouldings. Board Size Choose an option1x4-12'1x6-12'Clear Flextrim Flat Stock quantity Add to cart Add to basket for Quote * Please select length and quantity to add to basket for quote. Additional Information Made out of poly resin, holds up well to all environments.