Logic trainer rvfm idl 400 logic trainer 1896 number of holes 0 3 to 0 8mm wire size acceptability pulse generator 1hz 10hz and 100hz square wave logic gates six dual input and gates six dual input or gates six dual input nand gates six dual input nor gates six dual input xor gates six not gates all the equipment you need to learn about logic in one comprehensive package 420mm length 360mm width 200mm height 4 2kg weight k h idl 400 logic trainer