All HULL HUGR products are manufactured from a UV-resistant and tear-proof vinyl / polyester tri-laminate. These dock bumpers are 36” x 6” x 4” and are filled with high-density closed-cell polyethylene foam. There are 4 corrosion-proof stainless steel grommets for mounting to docks. White. WARNING: This product can expose you to chemicals including Vinyl chloride, which is known to the State of California to cause cancer, and Di-n-hexyl Phthalate (DnHP), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to