what is glass t
S-2 is the S-glass that made it to the tackle market in the mid-70s. S-glass is more expensive than E-glass, but less expensive than carbon fiber. T-glass is a proprietary product from Japan. The composition, strength, and modulus are essentially the same as S-2 glass. The high strength fiberglass market also includes R-glass, S-1 glass, HS4-glass, and U-glass.