piston with rod 3d model

A 3D model of a stylized piston with an integrated connecting rod (biela), minimalistic and clean design. The entire piston, including its interior, is solid, not hollow. The connecting rod is fused directly to the piston's base, forming a single, robust, and continuous solid object. The piston head is smooth, without fine details like rings or complex textures. There is a prominent, circular indentation near the top of the piston for attaching a metal keyring. The overall form is perfectly solid and watertight, designed for easy 3D printing at a small scale. Metallic gray color with a touch of red for the connecting rod.