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GRP Threaded Bars is a firm that specialises in supplying fibreglass threaded bars.

Threaded bars, nuts and bolts by GTB are made mostly of epoxy resin and fiberglass (Glass Reinforced Plastic). The products features include high mechanical resistance, chemical inertia, resistance to high temperature low temperature (cryogenics) and ultraviolet rays.

They are also light, amagnetic and to not require maintenance.