Comes in 10-Pack, size: 7#; Bottom Diameter: 30mm; Upper Diameter: 37mm; Height: 31mm Please read the dimension description image carefully before making a decision (might have 1mm measurement error) Exhibit excellent resilience and retain pliability over a long period Please note these rubber stoppers are not food grade Warranty: Labasics 1-year limited warranty; if received damaged, please contact us immediately; we will solve it until satisfied