3 or 4 foot lengths of weatherstrip. Available special order in other lengths. Commonly used on double hung windows. Narrow width allows installation without interfering with pulley and weight system. 1/2 inch width also available for thinner windows. Can be inserted without removing sash. Fasten with coppered nails. 123B x 36"Regular price: $7.78Sale price: $7.78, 2/$10.60, 4/$16.24, 8/$27.52, 16/$50.08, 50/$113.00 . 123B x 48"Regular price: $8.72Sale price: $8.72, 2/$12.48, 4/$20.00, 8/$35.04, 16/$65.12, 50/$150.50 Coppered Nails 3/4" x 17Copper plated steel nails suitable for weatherstripping. Traditionally used with spring bronze weatherstrip. 1-1/2 oz. package. Contains about 150 nails. If you nail every 1-1/2" this will fasten 18 feet 9 inches of weatherstrip. If you nail every 2" this will fasten 25 feet of weatherstrip. If you nail every 1.6" 5 packages will fasten 100 feet. 51758$1.19, 5/$4.50