Manny Ramirez G/U Bat

[maccamania]

Ebay Item number:http://pics.ebaystatic.com/aw/pics/s.gif#250278741502....on the knob there is a "M' engraved and written in silver is "313", I have never seen the M or 313...Does anyone know what that represents.....

[gamer35]

Its a test bat sent by LVS to see if the player likes the specifications. The 313 is actually 31.3 and it is the weight of the bat.