- R.P ROLL - N.V Roll - PET Green Roll - Two Layer roll - Virgin Roll All our PP box straps are made from first grade virgin PP. This gives it excellent strength and great look. We also provide option to have any name or other details printed on the strap. Both heat sealable (machine use) and manual use types of straps are available. All different size ranging form width 6-18 mm, and thickness of 0.5 - 0.8 mm is available, in various different colors.