solid cylinder 3d model

"Create a solid 3D cylinder with a height of 270mm and a diameter of 110mm, featuring a smooth, solid grey finish. The design must include specific machined notches on both the top and bottom circular faces to accommodate an LED strip. On each face, generate exactly 16 U-shaped slots distributed symmetrically around the full circumference. Each slot must be 18mm wide and 9mm deep (radially). For geometric precision, these slots must be positioned at a 22.5-degree angle between their centers, leaving a solid wall of approximately 3.6mm between slots at the outer edge. Crucially, these notches must be cut at a 45-degree inclination relative to the cylinder's vertical axis to allow for a natural spiral transition of the LED strip. The central body of the cylinder must remain completely solid and smooth, with the top notches perfectly aligned vertically with the bottom notches