milliard see-thru pool vacuum head/triangular, weighted base/for inground & vinyl pools milliard this specially designed vacuum attachment literally sinks into the deep end when faced with algae and pool grime. its triangular plastic body is shaped for maneuverability so it can swivel and twist through corners, along walls, and into crevices that may escape other cleaning devices. the spring-loaded handle also fits standard extension poles for extra reach.