This Johnson electromagnet spring assembly is designed for use with the 26 x 52 STA pull tube solenoid, P/N 195222-2XX (sold separately) by replacing the plunger in the solenoid with the one from the kit along with the short or long spring from the kit. The armature is 2.54 mm longer than the standard armature to accommodate the spring. Contents of the spring kit: - short spring - long spring - Replacement Piston - Circlip - flat washer The short spring is designed for strokes up to 13 mm and any duty cycle of the solenoid's power. The long spring is designed for strokes up to 18 mm and a duty cycle of only 25% or 10%. The solenoid can do not excite the spring at lower duty cycles than 25%. https://elecena.pl/product/18775589/153867-200-spring-kit-for-ledex-26x52-pull-1-56-2-71-n-cm 2021-06-12 https://elecena.pl/product/18775589/153867-200-spring-kit-for-ledex-26x52-pull-1-56-2-71-n-cm 2021-10-04 https://elecena.pl/product/18775589/153867-200-spring-kit-for-ledex-26x52-pull-1-56-2-71-n-cm 2024-05-31 https://elecena.pl/product/18775589/153867-200-spring-kit-for-ledex-26x52-pull-1-56-2-71-n-cm 2024-08-19