Perforated Polythene per metre
From: Watering and Irrigation : Capillary Watering Systems & Matting
A 120 gauge black Perforated Polythene to use on the top of water or capillary matting to reduce water evaporation and suppress algae growth.
48" (122cm) wide.
Supplied in continuous lengths to avoid any wastage simply purchase as many metres as required and cut to size.