New Monk Weapon: Kiseru (iron pipe)

Here's an exotic weapon for sensei monks that already appeared on the Paizo boards.

Kiseru
Price 6 gp; Type light; Proficiency exotic; Damage (M) 1d4; Damage (S) 1d3; Critical x2; Weapon Groups close, hammers, monk; Weight 2 lbs.
Qualities Concealed (1), Improved Damage (1), Tool (smoking pipe) (0), Weapon Feature (disarm, monk) (4)