About this 3D model

This is a light, fast to make, customizable and stylish penholder. It's made of two differents parts That You can print in every material you want. It Has Been designed in mm and it should be 120 mm (12 cm) height and about 70 mm (7 com) of diameter. Pay attention to the small cylinders of interlocking on the top of the internal part. PLEASE REPORT ME EVERY PROBLEM OF THE MODEL SO I WILL FIX IT.