TOTO SS124#01 SoftClose Elongated toilet seat in Cotton White color, compatible with TOTO WASHLET+ toilets having the extra “T40” hole for future WASHLET installation (this version seat covers the additional hole for the WASHLET power cord and water supply line). 
At Bath Butler Bidets, we're an authorized TOTO dealer — a small, family-owned business out of Vinton, Virginia. Every order ships free to the continental US, and there's no sales tax outside Virginia. Call us at (540) 277-9980 or email Sales@BathButlerBidets.com — we're happy to help you choose.