Used in 2 applications:
(1) for RAKED stair installations, cut to required size as a spacer between balusters for snap into undercapping rail
(2) for 3 rail installations, snap into undercapping rail to fill void as balusters do not penetrate into uncapping rail. TIP: infill is 1400mm wide so if opening size is wider than 1400mm, then 2 x infills will be required. Use a full length plus a shorter length or for a neater finish, cut each such that the join of infill is at midpoint of undercapping.
