1, Screw mount 30Amp 300V 2x12 position screw terminal block distribution module. Support for multiple module extension connections. 2, A / B position maximum current 30Amp(each position). A1~A12 total maximum current 30Amp(total positions). B1~B12 total maximum current 30Amp(total positions). A1~A12 / B1~B12 position maximum current 20Amp(each position). Maximum voltage 300V. 3, A / B terminal blocks, Pitch 7.62mm/0.3", Wire range 26AWG ~ 10AWG / 4.0mm square, Rated voltage 300V, rated current 30Amp. Strip length 8mm. Screws - M3,steel, Cr3+ Zn plated. Pin header and Cage - Brass. 4, A1~A12 / B1~B12 terminal blocks, Pitch 5.0mm/0.197", Wire range 26AWG ~ 12AWG / 2.5mm square. Rated voltage 300V, rated current 20Amp. Strip length 7mm. Screws - M3,steel, Cr3+ Zn plated. Pin header and Cage - Brass. 5, High quality fireproof nylon material mount carrier (not China low quality carrier). Also included are two M3 x 10mm wood screws, you can easily mount it on a wooden board.