Material: the lampshade is made of sturdy and hard plastic which is and can maintain long service life Widely apply: the plastic lamp shade reducer rings are compatible with most and other European made lamp shades Main application: the plastic lamp shade ring converter is suitable for fitting Screw (ES/ E27) lamp shades to Bayonet Cap (BC/ B22) lamps and lampholders E27 to E14 Plastic lamp shade ring converters are suitable for both pendant and upright lampholders