The Straight Cork from Youngs is known for its elasticity combined with its near-impermeability makes it suitable as a material for bottle stoppers especially for wine bottles This cork has an almost zero Poisson\'s ratio, which means the radius of a cork does not change significantly when squeezed or pulled. This handy tool is perfect in the bottle process of your homebrewing Straight Cork Features Youngs Straight Corks Std (100\'s)/5503 The elasticity combined with near-impermeability Airtight Bottle stopper Youngs\' Ref. MPN: 5503Colour: CorkSizes: One SizePM Ref: 896289