Common Q/A: A. What is the difference between those polishing materials? AUTDER offer you with 4 materials polishing pad: coral fleece, cotton, microfiber, wool fleece The roughness of the four materials is different, from coarse to fine are wool fleece, full cotton, microfiber, coral fleece All of them can complete the polishing and waxing work separately, but we recommend that: a. Opt for the one made of wool fleece or cotton when polishing b. Opt for the one made of coral fleece or microfiber when waxing As rougher materials are more suitable for polishing, thinner materials the materials are more suitable for polishing B. The link shows that the specification of the waxing sleeve is 5-6 inches, It means diameter or the radius？ Unified as diameter C. The size of my polishing machine is between 6-7 or 8-9, which size of polishing pads should I choose? Normally, we recommend that you choose a smaller size range, which means that: When the size of your polishing machine is between 6 to 7 inches, I suggest you choose 5 to 6 inches When the size of your polishing machine is between 8 to 9 inches, we recommend that you choose the 7 to 8 inches one D. When receiving the waxing sleeve, there is some fine fluff on the waxing sleeve, do I need to return it? Note: It is normal for there are some floating fluff on the polishing pad when you first use it, just idling your polisher with the pad a few minutes to shake off the lint hair E. If the product has quality problems, what should I do? We suggest that you contact us as soon as possible. We take all responsibility for any products with quality problems. Even if the Amazon return window has been closed, we will arrange a refund or reissue for you