Profile thickness: general wall thickness can be measured with calipers is 1.2mm, better wall thickness is 1.4mm, better than 1.6mm, this should be used according to the occasion to ensure that its performance strength will not lead to too much waste.  

What we usually mean by a good aluminium door window is a smooth line, perfect, flat finish and low profile color difference.  

Sealing rubber strip to have good scalability and renren and anti - aging performance.  The rubber strip at the corner should be installed tightly, the line shape should be smooth, and the increased strength and air tightness should be identified.