Size 4 humming bird bottle stoppers
Rubber stopper with feeding tube for bottle type hummingbird feeder. 1 1/16 inches in diameter at widest, 13/16 inches at smaller end, 1 inch tall. In metric 2.7 cm at widest, 2 cm at smallest, 2.4 cm tall. I drill out the stoppers myself and add the tubes. The stoppers are chemical supply stoppers and are of high quality.
Need more than one set, contact me.