Lego compatible parts

Some lego compatible parts. Main and the bigest one is housing for geared dc motor. Connectors which fits on shaft of geared dc motor as seen on picture. Three different ones for different wheels. Then you have SR04 ultrasonic holder. SG90 servo holder also lego compatible. And pcb lego compatible holder. Robot on the picture is build out of lego mostly with this 3D printed parts incorporated into design.