Features: silica gel products Used in cherry axis, KaiHua axis, noppoo axis, Gateron axis, crown's axi Specifications: Material: Silicone Color: Black,Blue Sizes: 8 x 5 x 1.5 mm This for one bag of 120 O-rings of a specific type. 1.5 mm: Most O-rings are this size. They won'for t do much to affect travel distance, but they will reduce noise. Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. Package includes: (Without retail package) 120 x O-Rings Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store