Arsenal, a private equity firm, completed the acquisition of AvCarb, a producer of gas diffusion layer and specialty engineered carbon fiber products. Financial terms were not disclosed. "As AvCarb's customers accelerate the deployment of decarbonization technologies such as fuel cells, their needs for production capacity, development support, and customer service are increasing rapidly. Arsenal brings scale, resources, and experience that will ensure AvCarb continues to support customer success across product lines and around the world," Guy Ebbrell, AvCarb President.