日成金属电 缆防水接头 Brass Cable Gland 0 Non-protected ⋯ 1 Protected against solid foreign objects of 50 mm diameter and greater The object probe, sphere of 50 mm diameter, shall not fully penetrate *) 2 Protected against solid foreign objects of 12,5 mm diameter and greater The object probe, sphere of 12,5 mm diameter, shall not fully penetrate *) 3 Protected against solid foreign objects of 2,5 m