SRB-J Cleaning Pigs consist of a carbon-steel body utilizing a urethane chain, and with four easily replaceable polyurethane cups and two split-ring brush assemblies. Models 6″ through 8″ are center-rod type. Also capable of being fitted with a gauging plate machined to customer specifications. Options and other configurations include carbon-steel, stainless-steel or aluminum body; cups manufactured from neoprene, viton, epdm, buna-n or other elastomer compounds for special services; carbon-steel, stainless-steel, or prostran brushes; aluminum or steel gauging plate of varying thickness (available with slots); transmitter or pinger cavity; magnets for ferrous debris or for magnetic detection; modified configuration to include discs for increased sealing capabilities or substitution of discs for bidirectional use; customized dimensions for special pigging applications.