3 or 4 foot lengths of weatherstrip. Available special order in other lengths. Commonly used on double hung windows. 1/2" width allows weatherstrip to avoid pulley and weight system. Can be inserted without removing sash. Fasten with coppered nails. 122B x 36"Regular price: $7.52Sale price: $7.52, 2/$10.04, 4/$15.08, 8/$25.16, 16/$45.32, 50/$100.80 . 122B x 48"Regular price: $8.48Sale price: $8.48, 2/$11.84, 4/$18.56, 8/$32.00, 16/$58.88, 50/$134.50 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