50030-01: S.S.304 boat hook holder(PRS), 
                 15.9mm~31.8mm
50030-02: S.S.304 boat hook holder(PRS), 
                 25.4mm~44.4mm
54052-01: S.S. 304 antenna extensions,
                 152.4mm(L), w/25.4mm-14 pitch
                 threads (M And F) at the ends
54052-02: S.S. 304 antenna extensions, 
                 304.8mm(L), w/25.4mm-14 pitch
                 threads (M And F) at the ends
54052-03: S.S. 304 antenna extensions, 
                 609.6mm(L), w/25.4mm-14 pitch
                 threads (M And F) at the ends