if you want to drive it from arduino, it has to be a logic level mosfet (which will be fully on at Vgs = 5V )
other important parameters are the Id current it is rated and the minimum RDSon value, the lower, the better.
450mA is a low value , you'll find a lot of mosfet -
you could have a look here : Logic Level MOSFET Selector Guide
maybe others will give you a ref. number 
PS: other parameters may be important if you need to drive it at high frequency