Piece 1 is about 10 inches long rod with threaded end 1 1/2 inch circumference .75MM width Piece 2 will connect to piece 1 with female end about 1 inch deep. It will have 2 Inch Wide round fan blades connected 1 inch apart each blade will be about .75MM width, the 2 blades will be one piece with the rod extension of about 3 inches so the total length of Piece 2 will be about 5 inches including the 2 fan blades. TPU Material Red Color The 1 mm would be the measurement width. Basically imagine the piece that you are 3d printing will slide inside of the an existing golf shaft so the end needs a slight taper so that it wont fly out. I'll also secure it with epoxy. Basically I'm using old golf shafts cut to 35 inches as the Top Portion of the club then using the TPU extension that you create for the end part that has some whip to it and then the very end pieces hold the weights and with the weights off creates a mini resistance fan like affect for speed I can email my rough drawing and jpg CAD drawing