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We specialize in producing this spool insulator ,it is manufactured from wet process porcelain to ensure a lifetime of trouble free performance. They are designed by the experienced engineers, and tested by the advanced quality test enquipments.
Spool insulator type: 53-1,53-2,53-3,53-4,53-5
Applicable standard:ANSI C29.3 and etc
spool porcelain insulator