If you have worn down or torn up boom arms it might be time to re-grip your boom. 

Get that new boom feel with some new boom grip. Chinook Boom Grip Set (2-pcs) 

Comes in Black Only and is 4-5/8"wide X 72" long

Two 72 inch long soft foam grips. Enough to re-grip one boom.

Once you have removed all the grip from your old boom, coat your boom with a good impact adhesive, and then place the grip along the length of the tube, where the two edges meed push hard and then sand away the hard edge. (Glue is not supplied).