Cuttable Micro Compression Spring 2.5mm x 40mm Carbon Steel
Polar Bear Camera
Tiny compression springs are often used in the camera lenses, commonly found beneath the ball bearings in the aperture ring. It is exceedingly difficult to find because of its small size, which makes it a non-generic spring. These cuttable springs from Polar Bear Camera can be cut to the right length, simply cut with a wire cutter.