Contains 1 set of plastic insulators (top / bottom) and fixing screws to be used where the overload relay power terminals external dimension exceed the busbar external dimension.DocumentsWEG RW_E Series Overload Relays Brochure Related Products Quick view IBRW317 $2.64 MSRP: $4.00 Phase Barrier Quick view 6354C08G01 $6,592.77 MSRP: $8,790.35 Inter Phase Barrier Quick view LDRSF11 $24.29 MSRP: $37.40 Dc Switch Phase Barrier A Quick view LDRSF12 $35.12 MSRP: $54.08 Dc Switch Phase Barrier B Quick view OTB800/6 $92.89 MSRP: $169.34 Phase Barrier Kit For Ot600U