Create a unique 2-hour fire-rated Wall with our Seves 'High Performance' F-120 glass block.  This product tested to ASTM E-119, UL 263-19 and CAN/ULC S101-14 standards for Up to 2-hour fire-rating.  The Wave patterned clear glass block (19cm x 19cm x 13cm) with its random intersecting patterns creates a subtle distortion while allowing maximum light transmission.