1 Kg DRAW BAR To fit both SM32 scale or G Scale Non-Polarized Magnetic Coupling To fit as first time coupling or replace a Accucraft chopper coupling, Contains - 1 pair MAGNETICCOUPLINGS Non-polarized with Base for SHORT gap between rollingstock. Complete with No.2 x 6.5 mm self tapping screw 4-off. Compatible with all Porterhouse Model SM32 and G scale couplings. There is no A & Bend these couplings will work either way round that you place your rollingstock / locos guaranteed mating no fuss. Royal mail second class for.