GPP&reg; NEW X12 Replaceable 30" 7.8mm Carbon Shaft Plastics Fletching W Aluminum Seat Arrows Shaft length: appox. 30inches/76cm Outer diameter:7.8mm Material: Black Carbon Weight: 28g Arrow for compound and recurve bowThe nocks are not fixed by glue. Pls adjust them and fix them by yourself!! The nock way is different with recuve bow and compound bow!!!