T-mode keel Model sjl-a inner main strip match with outer slot strip is a break through on original basis that it improve in instructor and quality of product, more stlish, smoother. Compare with the traditional ones, model sjl-a inner main strip is much easier to install and perfect vision. Lt is much more stronger than the original strips. The outer slot strip matching with high-quality metal ceilings not only looks noble and elegant, but also shiny and good match. They are the first chose meterial in hall, exhibition, hotel, loft, and super market. Odel-t keel is made of advance galvanize and painting board for better anticorrisive and fire-proofing. Lt is easy to lnstall and strong enough for pressure. There are many kinds of products in defferent size. Standard lot size , weight , dimensions