Glasswool is usually hearth resistant, helping to guard buildings from hearth, and it is immune to various climatic conditions, making it appropriate for use in various environments.Open up end/terbuka. Grating open up stop di sisi kiri dan kanannya terbuka tanpa ditutupi plat tambahan. Biasanya grating open end dijual lebih terjangkau.PT. Karya Ut