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DIAMETER x BORE               SMT618 PLASTIC  SMT624 FIBRE    SMT628 S PERIOR
(4") 100mm x 16mm- 40Grit                                 GB140040
(4") 100mm x 16mm - 60Grit                                GB140060
(4") 100mm x 16mm - 80Grit                                 GB140080
(4") 100mm x 16mm - 120 Grit                              GB140120
(4.5") 115mm x 22mm - 40 Grit   GB24540              GB145040               GB1X45040
(4.5") 115mm x 22mm - 60Grit   GB24560                GB145060              GB1X45060
(4.5") 115mm x 22mm - 80Grit    GB24580               GB145080             GB1X45080
(4.5") 115mm x 22mm - 120Grit                               GB145120             GB1X45120
(5") 125mm x 22mm - 40Grit        GB25040               GB150040            GB1X50040
(5") 125mm x 22mm - 60Grit        GB25060               GB150060            GB1X50060
(5") 125mm x 22mm - 80 Grit        GB25080               GB150080            GB1X50080
(5") 125mm x 22mm - 120 Grit                                   GB150120             GB1X50120
(7") 180mm x 22mm - 40 Grit                                    GB170040               GB1X70040
(7") 180mm x 22mm - 60 Grit                                    GB170060               GB1X70060
(7") 180mm x 22mm - 80 Grit                                    GB170080               GB1X70080