The blue metal 14 mm is a hard rock which is bluish in color and is crushed for use in construction and decoration work of a landscape. The 14 mm size of the blue metal is ideally used for concretizing and used as drainage gravel by plumbers in the pipe works under the buildings. This type of sand is also useful for gardening purpose where porous sand is needed. Supplied by local quarries, the blue metal 14 mm sand can also be used as filler around pipes, make custom decorative designs and used around the edges of swimming pools. This type of sand can be used for other applications such as manufacturing of bitumen, using it between Geofabs for creating a water table on golf course and the larger blue metal ballasts are commonly installed underneath the railway tracks.