● Collar threads, plunger threads and base mounting holes enable easy (on most models) fixing. ● Designed for use in all positions. ● High strength alloy steel for durability. ● ECR-400 coupler and dust cap included with all models. ● High strength return spring for rapid cylinder retraction. ● Backed enamel finish for increased corrosion resistance. ● Wiper seal fitted to most models to prevent penetration of dirt and extend cylinder life.