This is a Tilly Tec Light head protector for the TillyTec 4500 dive light. Its a snug fit, so you can just slide it on without any additional clips etc. but please pick it up if you were to loose it not to litter, and I printer mine with PLA. I used a higher than usual fill density 40% to ensure that it is stable also I used solid infill to get a more robust part. The one shown in the photo is not the finished version, the STL file is as high as the front part of the lamp head 32MM, but I am not the patient type. Will put an update to how it behaved underwater. Here is a link to a viedo I took with my light and home printed Goodman Handle for my Go ProGoogle Sketchup for the drawing (my first ever) Slic3r... Well for Slicing Repetier Host (Printer control) German RepRap Protos V2 Homemade and upgraded printer Orange PLA for easier finding if lost Base Plate 70C for first layer 63 thereafter Extruder 210 for first layer 206 thereafter