Built-In Concealed Flush Tank System For Walls Space-Saving Wall-Mounted Solution This ultra-slim concealed tank (90mm depth) features: ✓ Seamless wall integration with hidden carrier frame ✓ Dual-flush buttons for water efficiency ✓ Universal compatibility with major WC brands ✓ User-friendly adjustable dual flush valve:3/4.5L,3/6L,4/7L