Cosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 5 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 5 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 31mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 4 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 4 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 28mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 1 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 1 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 13mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 2 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 2 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 18mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 7 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 7 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 38mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 3 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 3 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 24mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 6 spinning dark blue stems have a rounded top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 6 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 35mmCosmo Fit Shaft Gear in dark blue are made from a polycarbonate resin to strengthen the stem at both the screw thread and the base of the top. These size 8 locked dark blue stems have a flat top to allow the flight to rotate and the normal stem profile tapers from the bottom of the stem to where it meets the flight. The given length of these size 8 dark blue stems is what is visible when the dart is fully assembled. Shaft length: 42mm