Safety Key for treadmill | contact slat trapezoid

Safety key for treadmill compatible with contact slat trapezoid.
Warning: we sell the safety key with the round shape (see pictures). The trapezoid one is not manufactured anymore. The round shaped key is compatible with the trapezoid one.
This key is the standard size of prong. The metal part base is 20mm, 17mm on top, length 17mm. Cap diameter 32mm. Another version is available on request (cap diameter 39 mm, metal part base 18, top 15 mm, length 15mm).