An assortment of neoprene and fiber sealing washers from The Hillman Group. Neoprene rubber washers are small flat rubber rings used on fasteners and in mechanical devices. Fiber washers are great for use in light sealing applications and protecting surfaces from scratches. Variants included in this assortment range from 5/32" to 7/16" in inner diameter and all measure 1/16" thick. Full assortments of #3809 contain twelve (12) refills comprised of Hillman item numbers #3810 - #3821.