Aluminum Coupler With Expandable Sleeve, Type WS-AA and WS-E-AA	Aluminum Rigid Coupler for Pipe, Type WWC-AA and WWC-E-AA	Aluminum Coupler, Expansion, Type XWWC-AA and XWWC-E-AA
Aluminum Reducing Coupler for Pipe Schedule 40, Type WWCR-AA	Aluminum Weldment Spherical Coupler Type WWSC-AA	Aluminum Reducing Coupler for Pipe Schedule 80, Type WWCR-E-AA