270 piece 0-ring assortment kit. Contains eighteen different sizes for a variety of applications. These o-rings are made of HNBR (hydrogenated nitric butadiene) rubber material. Consists of: 91339-01: 7/32 x 1/16” (5.29 x 1.78 mm) (20 pcs) 91339-02: 1/4 x 1/16” (6.07 x 1.78 mm) (20 pcs) 91339-03: 6.8 x 1.9 mm (20 pcs) 91339-04: 5/16 x 1/16” […]