... slidingMaterialframe and sash are plasticConstituent Partprofileprofile:uPVC & PVC,top quality profile brandcolor:common is white,wooden color ,etcthickness: ... surface no air bubble,clean color without impurity .glassglass :single /double /triple layerincluding :4mm ,5mm ,6mm,8mm , ... 10mmspace: 6A,9A,12A ,22Ahardwaresealing :PVC & EPDM rubber sealshape :O & Kcolor:black ,white ,grey ...