So our drain that came with the vanity does not fit in the drain hole 🙄 why would project source supply that if they don't check kto see if it fits the vanity's before sending them out?

Hello Janethebuilder, Thank you for your inquiry. Although we can confirm that the Project Source 30-in Gray Single Sink Bathroom Vanity with White Cultured Marble Top has a pre-drilled for a 4 in. centerset faucet, we can confirm that the faucet and drain assembly is not included with the purchase. Our best recommendation would be for you to consult with your local Lowe's Kitchen and Bath team member for the faucet and drain assembly (as most drains come with the purchase of a faucet) that best matches your room decor and color scheme. Best Regards.