Hollow widest capable of carrying 5+27A+5 work programme, you can clip flowers or hollow louvers, sublimation bedroom style, extended personal function. Professional and meticulous seal design, ensure better tightness of sound insulation, water tightness and thermal insulation, supporting Germany Strip for virtue, superior quality, reliable and professional. Standard Germany Ji Liya push-pull system metal, carrying oversized doors, matching mansion, nimble, easy to use more durable