Delta Tetra Single Handle Mid-Height Vessel Bathroom - 689Delta Tetra Single Handle Mid Height Vessel Bathroom 689 Familiar geometries and subtle curves combine in the Tetra Bath Collection to bring a sleek, architectural look and feel to the bath. Delta faucets with Diamond Seal Technology perform like new for life with a patented design that reduces leak points, is less hassle to install and lasts twice as long as the industry standard. WaterSense labeled faucets use at least 20% less water than the