Neutrocork® is the latest in new-generation natural cork closures. This 'micro-agglomerated' cork is composed of small, uniformly-sized cork granules that have been pressed into an individual mold. The result is an attractive, natural closure that is affordable, easy to remove, and extremely durable - so it stands up to mechanical bottling. The Neutrocork® is recommended for wines intended for consumption within two years. Specifications: Form Factor: Straight Material: Natural Cork Composition:Micro-Agglomerated Length: 37mm (1.5") Diameter: 22mm (0.9") Legacy Sizing: No. 8 x 1 1/2" Wine Storage Duration: Recommended for up to 2 years.Recommended Corker:We recommend using a hand held double lever, floor, or bench corker for this style of cork.