Image Item No. Description  40918c01  Technic Linear Actuator Long with Dark Bluish Gray Ends Catalog: Parts: Technic  92693c01  Technic Linear Actuator Mini with Dark Bluish Gray Head and Orange Axle Catalog: Parts: Technic  61927c01  Technic Linear Actuator with Dark Bluish Gray Ends, Type 1 Catalog: Parts: Technic  43097c01  Technic Linear Actuator with Dark Bluish Gray Ends, Type 2 Catalog: Parts: Technic