Material No. of holes For pipe sizes: 1 ½" x 1/8" 1 ½", ¾", 1" 1 ½" x ¼" 1 1½" to 10" 2" x ¼" 1 2" to 16" 3" x ¼" 1 2" to 16" 3" x ¼" 2 2" to 16"