The plastic steel sliding window is also a kind of sliding window. There is no difference between the plastic steel sliding window glass and the glass used in ordinary windows. There are insulating glass, double glass and tempered glass, etc. The difference from ordinary sliding windows is mainly in the window frame. The window frame of the plastic steel sliding window is made of hard polyvinyl chloride, that is, UPVC as the main material plus a certain proportion of stabilizers, colorants, fillers, UV absorbers, etc.