.Standard 1-3/4" drain opening: fits sink hole diameter 1-5/8" to 2-5/16". max sink thickness 2"..Ideal for any above-counter vessel sink without an overflow hole..Guaranteed 50,000 smooth bounce times..The sturdy brass metal structure ensures corrosion resistance, rust prevention, and maximum durability..Four layers of superior finishes surpass industry durability standards, will not fade over time..Easy to install: drain, thin rubber washer, thick rubber washer, hard washer, drain nut, the tail piece are all included. please follow the installation guide to ensure no leak..Limited lifetime warranty for all mechanical parts, 5 years warranty for finishes.