Click to open a broken insulation classification is divided into: fixed windows, hanging on the window, hanging in the window, under hung windows, vertical transfer window, door windows, casement pulleys, pulley windows, casement windows and doors hanging down, sliding doors, sliding casement window, folding doors, spring door, lifting sliding doors, sliding folding doors, sliding doors in the back. 2 Press the performance is divided into: general type doors, acoustic doors and windows, doors and insulation type. 3 Press the application site is divided into: internal doors, external doors and windows. 4 by brand: phoenix aluminum doors and windows, Guangdong Xingfa, Liaoning Zhongwang more. Thermal break http:. //www.zgpal.com5 By manufacturers Category: Beijing Hong Gloria doors, windows and easy network, Gothic windows, doors Indiana, Allison Wang doors and windows, doors and other emperors.