This shim set allows for ultimate adjustment of the pinion gear clearance in Shimano spinning reels, from 0.01mm to 0.7mm, in increments of 0.01mm, by replacing shims of different thicknesses. Washers are used to adjust the gaps in the rotating parts of spinning reels, and especially from the 18 Stella onwards, "Silent Drive" has been adopted, and as one of its elements, curved washers have been used instead of washers. Curved washers utilize the flexibility of the metal, and with just one of these washers, the gaps that vary from individual to individual are, to put it nicely, averaged out, or to put it less kindly, vaguely matched. However, being vague means that the adjustment is only "better" and not "best," and the minute pressure and friction that constantly occur on both contact surfaces tend to become a source of noise and discomfort to the fingertips when tuning. Therefore, by eliminating the curved washers and making appropriate adjustments with flat shims, a reduction in noise and a more direct feel can be expected. Examples of compatible models: 14.18.22 Stella 3000 and above 15.20.24 Twin Power 3000 and above 17.21.25 Twin Power XD 3000 and above 16.19.23 Vanquish 3000 and above 17-24 Exsence series 3000 and above 19.23 Stradic 3000 and above 20.24 Stradic SW 4000 only 20.24 Vanford 3000 and above 21.25 Ultegra 3000 and above etc. Contents: Inner diameter 6mm shims 0.01mm*2, 0.03mm*1, 0.05mm*1, 0.1mm*1, 0.2mm*1, 0.3mm*1 If you are unsure of compatibility, please feel free to send us a message with the model year, model name, and size. We also sell other shim sets, bearings, and chemicals. We can offer a discount on shipping if you purchase multiple items. Please feel free to message us if you are interested! ★ Noraneko Works Shim Sets, Bearings, and Bearing Shim Sets ★ Shimano Grease and Maintenance Grease Sets ★ Bored Grease and Various Oils ★ Glitch Oil Various ★ IOS Factory Grease and Various Oils ★ Other Smith Reel Grease, Microlon, Liquid Compound Sets, etc.