Aimeili Builder base is a clear coat that is used with a UV light. The builder can be used 2 ways. The thick clear coat is used with a nail form to create longer nail tip. 40 FOR 40 The builder is also used to create a thick layer great on thin brittle nails. I use it to strengthen my nails with or without nail polish. The first photo is me with the builder base and a clear coat. I purchased over 200 at auction, sight unseen. I thought I was 10 10 packs of builder base in various tints. I actually purchased all clear. My loss is your gain, buy more save more. I am very willing to make a deal to get some of my cost back. Non smoker in a Smoke Free Pet Friendly home! separate storing and packing areas. Clothing and shoes kept in a clean dry rooms that are mainly used for my resale closet. Check out my closets over 500 items to bundle and save! 90% of plastic used for package is recycled product Save the Plant #thrifting # reuse # recycle # bundleandsave Feel free to comment below