Profile: Progressive Products Inc. develops Ceram-back elbow for the pneumatic conveying of high abrasion wear materials. Our products include Ceram-back elbow, Flat-back elbow and Cast-back elbow. We offer Ceram-back elbow, which includes a jacket across the back of the core elbow that is approximately 1/2" of ceramic compound. Our Cast-back elbow is designed to withstand the impact of large particle conveying and includes 3/4" thick solid ceramic tiles that fit around the back of the core elbow.