Check the listing for details. SIZE 5.5 BLACK RUBBER STOPPERS (COUNT 3). Condition: New. Listed at 4.00 USD. International Buyers – Please Note: Customs and brokerage fees, import duties and taxes are not included in the item price or shipping cost. These charges are your responsibility. Please check with your country's customs office to determine what these additional costs will be prior to buying. Avogadro's Lab Supply Stoppers Size 5.5 Offered here are three, black # 5.5 stoppers. These are domestically manufactured lab grade stoppers. The stoppers are solid, natural rubber. The size of each stopper is molded on the top. The dimensions of a # 5.5 are: Diameter Top: 1.11" / 28.2 mm Diameter Bottom: 0.97" / 24.6 mm Height: 1.00" / 25.4 mm Durometer: 43 +/- 5 Free Sulphur: 0.05% To review the dimensions of all the stoppers Below you will find links to every stopper size ever made! But I need a stopper with holes! Four different sized sets of brass and nickel plated brass stopper borers are available. These sets will allow you to generate holes from 3 mm to 22 mm. Click for borers Shipping? Shipping is based on the cumulative weight and regardless of the quantity purchased your order will be shipped in one package for one fee. T his is a link to all of the available stopper sizes! All merchandise offered by Avogadro's Lab Supply is New from the manufacturer! Don't forget to visit my for great deals on all your lab supply needs!!!