Heavy Duty 500mm x 250m Black Cast Pallet Stretch Wrap - Std. Core (Box of 6)6 x 500mm x 250m 20 Micron Black Pallet Stretch Wrapping Film High quality cast pallet stretch wrapping film with extended core for ease of use. Cast stretch wrap is the more common option. It has a good level of transparency and is softer and easier to work with. Clear 20 micron cast polythene stretch film Core diameter 50mm Film width 500mm on standard core Film length 300mtr 6 rolls per case Case weight 20. 6kg