Description : 250pcs White Nylon O - Rings washers seal rings assortment , 15 different dimensions . Used to prevent leaks while working with plumbing , hydraulics , air and gas connections Rubber construction resists oil , gas , water and alcohol solvents , durable . Used for personal and professional workshops , garages , and plumbing services Comes with a plastic case for easy storage and carrying . Specification : Material : Nylon Color : White ( As Pictures Show ) Quantity : 250pcs Quantity + Dimension : 20PCS 3 . 5x11x1 20PCS 4x8x1 20PCS 4x17x1 20PCS 5x14x0 . 8 20PCS 5x10x1 20PCS 6x13x1 20PCS 6x18x0 . 9 20PCS 8x11x2 20PCS 8x16x0 . 9 20PCS 10x16x1 10PCS 12x20x1 10PCS 14x22x1 . 2 10PCS 16x28x1 10PCS 10x27x1 10PCS 20x30x1 Package Includes : 1 Box of White Nylon Washer Gasket Assortment (2 Pack) Note : Please allow 1 - 3mm measuring deviation due to manual measurement . Due to the different monitor and light effect , the actual color of the item might be slightly different from the color showed on the pictures .