1.TTB Terminal strip 2.plastic terminal block 3.copper terminal block 4.TTB Terminal block 5*2.5 mm,5*4mm,5*6mm,5*10mm,15*16m 1. PC, Polycorbonate, good glossniess, inflaming retarding, bounce impact force and thermal stability is great, working temperature : - 60°C to 135°C2.Brass, screw is Iron plated zinc.3.Voltage: 250 - 450V 4.Color: Natural color as standard TTB Terminal Block