X7
A model of aluminium arrow made by 'Easton'.
Usually blue or black in colour.
A better quality of arrow than the XX75 model.

XX75
A model of aluminium arrow made by 'Easton'.
Usually gold in colour and also available in camouflage colours.
The printed code number on the shaft indicates its size;
eg. 1816 where 18 is diameter of the shaft in 64ths. of an inch and
16 is the wall thickness of the shaft in thousandths of an inch.
Available sizes range from 1413 to 2514.

X10
A model of aluminium/carbon arrow made by 'Easton'.
Used by the top archers at the Olympics.
(Approx. cost $59.85 each plus points and nocks !!!,
very deep pockets required to buy a set of these).