Lee's Tackle Clamp On Center Rigger Holder - 1.050" Pipe. 050" Pipe The AL7300 (1-3/8"ID) series of Clamp-On Center Rigger Holders are available to fit standard size Schedule 40 Aluminum Pipe. Easy installation and unobtrusive design make this a popular installation where a horizontal pipe is available. This holder can also be used for other applications. Specifications for Lee's Tackle Clamp On Center Rigger Holder: Manufacturer: Lee's Tackle Color: Black Package Contents: Lee's Tackle Clamp On Center Rigger Holder Lee's Tackle AL7301CR: Clamp On Center Rigger Holder - 1.050" Pipe