Naveen Hydrocontrols offers Wiper Die for Wrinkle Free Compression. Naveen Hydrocontrols is an ISO 9001-2000 certified company. Wiper Die for Wrinkle Free Compression are required to fill the gap behind the bending form to get smooth, wrinkle free compression on the inner radius. During draw bends of higher thickness or lower thickness, wrinkles; humps will be formed in the inner bend radius of the tube, to avoid this wiper die will fill the gap behind the bending form to get smooth, wrinkle free compression on the inner radius.