3 panels sliding aluminum frame sliding glass windows 1,germany siegenia hardware 2,2.0mm thermal break aluminum profile 1,Hardware:germany siegenia hardware 2,tempered glass,low-e glass, floated glass ect 3,2.0mm thermal break alu profile 4,ISO9001:2000 5,surface treatment:powed coated or wood grain 6,can do arc-shaped 7,guarantee quality ,can do three trucks ,within flyscreen 8,good water proof ...