Wrap your hay bales with these secure fitting bale caps. These bale bag caps have been U.V. treated to ensure your bales are not at risk of deterioration due to excess sun exposure. Slip the silage bag ends caps over in-line wrapped bales to prevent spoilage due to air reaching your crops. Each cap has been designed to fit a 54-inch by 48-inch bale (137 cm x 122 cm).