1) Soft and hard co-extrusion adhesive strip is easy to install and not easy to fall off.
2) The cooper plunger can be automatically locked after adjustment, not easy to loose, durable and stable sealing effect.
3) Internal case can draw out as a whole, convenient to install and maintenance.
4) Optional for brackets installation or top installation.
5) The top installation is convenient and diversified, extract the whole lifting mechanism to install, or only extract sealing strip to install.
6) Internal four-bar linkage mechanism, flexible movement, stable structure, stronger anti – wind pressure.