The frame & bars are made of extruded aluminum. The bars are available with 0 or 15° deflection. The DDLBG & DDLBR consists of two sets of bars: front horizontal fixed bars & rear adjustable vertical bars. The SDLBR & SDLBG consist of one set of fixed horizontal bar. Linear Bar Grille can also be made into corner or curved shape, as per the site measurement. Standard color finish is white powder coating - RAL 9010 or RAL 9016. Other colors are available upon request.