1, Screw mount 30Amp 300V 4x4 position screw terminal block distribution module. 2, Terminal block INLET A / B / C positions, maximum current 30Amp(each position), maximum voltage 300V. Pitch 7.62mm/0.3", Wire range 26AWG ~ 10AWG / 4mm square. Strip length 8mm. Screws - M3,steel, Cr3+ Zn plated. Pin header and Cage - Brass. 3, Terminal blocks OUT-1 to OUT-4 A / B / C / D positions, pluggable screw terminal blocks, maximum current 20Amp(each position), maximum voltage 300V. Pitch 7.62mm/0.3", Wire range 28AWG ~ 12AWG / 2.5mm square. Strip length 7mm. Screws - M3,steel, Cr3+ Zn plated. Pin header and Cage - Brass. 4, High quality fireproof nylon material mount carrier. Also included are two M3 x 10mm wood screws, you can easily mount it on a wooden board. 5, FR-4 fiberglass dual copper layers PCB, UL 94-V0 certified PCB. UL CE CQC certified terminal blocks. UL CE certified nylon material mount carrier.