Heavy gauge green house polythene sheets(180-200 microns-around 0.2mm) and troughs(Dum coats) for fencing and making kitchen gardens.Vegetable gardens made using the black troughs save space and are the norm nowadays. Polythene sold by measurements of per square meter or in kgs.1kg polythenes go for 280bob
The polythene are large enough for use in silage storage,etc.