Round shields effect:
Can be used to screw, light poles, pillar, mandrels and other circular rotating cylinder for protection. Can a horizontal or vertical use. Level when using suggest using plastic or aluminum support ring, maintain shield between inner cavity and screw a certain uniform distance, prolong service life. Tensile length in each big metal ring, improve the trade-off with the stability of the shield. Connection or fixed end usually use metal flange constructed, also can choose a set of hoop type
