This shim set allows for ultimate 0.01mm increments of adjustment for main gear clearance, compatible with all reels using 7mm inner diameter shims on their main gears, regardless of whether they are Shimano or Daiwa, and with main gear bearings of 13mm outer diameter and 7mm inner diameter. As shown in the second image, by using these shims between the main gear bearing and the body, you can achieve ultimate shim adjustment in 0.01mm increments. Before the 18 Stella, shim adjustment was done on the inner race of the bearing using 7mm inner diameter shims, but from the 18 Stella onwards, this method of shim adjustment on the outer race of the bearing was adopted. There are no major problems even if mixed with the original 7mm inner diameter shims. The drive gear clearance is adjusted to the manufacturer's standard shim adjustment during assembly, but because they are mass-produced, not much effort or time can be spent on the adjustment, resulting in increments of 0.025mm. Also, due to variations in quality, there are individual differences, such as feeling handle play or experiencing a heavy feel or noise when reeling, even with new products. Shim adjustment is also effective in solving changes in feel that occur due to changes in clearance during gear wear from long-term use or when replacing bearings or gears. By making fine adjustments in ultimate 0.01mm increments, you can adjust to your preferred feel, such as prioritizing noise reduction and lightness of reeling by widening the clearance, or eliminating play and prioritizing smoothness by narrowing it. ★Main Compatible Models★ All reels, regardless of Shimano or Daiwa, that use 7mm inner diameter shims on their main gears, and have main gear bearings with an outer diameter of 13mm and an inner diameter of 7mm. Contents: 13mm outer diameter shims 0.01mm*2, 0.03mm*1, 0.05mm*1, 0.1mm*1, 0.2mm*1 If you are unsure of compatibility, please feel free to send a message with the model year, model name, and size. In addition to this, we also sell shim sets, bearings, and chemicals. We can offer a discount on shipping if you purchase multiple items. Please feel free to send a message if you are interested! ★Shimano grease (single item and various sets) ★Bored grease and various oils ★Glitch Oil (various types) ★Hedgehog Studio Alchemy Oil (various types) ★Noraneko Works shim sets, bearings, and bearing shim sets (various types) ★IOS Factory grease and various oils ★Other Microlon, etc.