GradesGrades PART SERIES SERIES TPA -C TIPS TPA-C Replaceable Tip for Gold-Twin PART SERIES Part D D tNumberDiameter (mm)Diameter (in)LengthPocket SizeIN2505 TPA1590R01-C 15.9mm 0.626 0.344 15 TPA1690R01-C 16.9mm 0.665 0.366 16 TPA1790R01-C 17.9mm 0.705 0.390 17 TPA1890R01-C 18.9mm 0.744 0.413 18 TPA1990R0a1sd-Cf 19.9mm 0.784 0.433 19 TPA2090R01-C 20.9mm 0.823 0.344 20 TPA2190R01-C 21.9mm 0.862 0.366 21 PlacehoTPldA2e2r 90R01-C 22.9mm 0.902 0.390 22 TPA2390R01-C 23.9mm 0.941 0.413 23 TPA2490R01-C 24.9mm 0.980 0.433 24 Modified -C Tip is NOT interchangeable with the Standard Gold-Twist Tip. SERIES SPGX...WG SPGX...WG Peripheral Inserts for Gold-Twin r D1 d t PartNumber D D TDiameter (mm)Diameter (in)ThicknessRRadiusPocket Size IN2505 SPGX060204WG 6.0mm .239" .094" .016" 6 SPGX07T308WG 8.0mm .316" .156" .031" 7 SPGX090408WG 10.0mm .390" .169" .031" 9 SPGX110408WG 11.6mm .457" .190" .031" 11 =P =M =K =N =S =H 152