ultrasonic non-woven bag,ultrasonic welding,ultrasonic welted ultrasonic non-woven bag,ultrasonic welding,ultrasonic weltedFeatures :1, various sizes and colors are ... Printing on OPP layer4, Production Method: Sewing or Ultrasonic welted 5, Price: $0.05-$1 depend on ... size, material thickness & printing6, Ultrasonic provide the high quality and the beautiful appearance7, Varies ...