Glasswool is really an insulating materials produced from glass fibers, which is created by melting glass at higher temperatures and then drawing it into high-quality fibers.Open up finish/terbuka. Grating open up stop di sisi kiri dan kanannya terbuka tanpa ditutupi plat tambahan. Biasanya grating open close dijual lebih terjangkau.PLAT TIMAH, Tim