23.5 x 44mm - In producting the superb reference corks, natural cork is micro-fragmented, and most of the TCA bearing material, called lignin, is removed. The remaining pure cork flour is blended with a very small percentage of plymer, which enhances the natural elasticity and sealing properties of the cork. The result is a nearly 100% natural cork, perfect in shape and without defect or pores, superior in appearance and sealing quality, and with far lower TCA levels than other corks. The ALTEC corks give you a perfect seal, and a superior appearance, every time! Custom Branding is available on ALTEC corks with a minimum order of just 5000 corks! SEE CUSTOM BRANDING selection.