This is the Stabilizer that I am using on my Parker UL31, I have been getting many comments on how quiet the bow is since I have been using this stabilizer, its length is 10.5 inches and weighs 5.2 oz they also make it in a shorter version and longer versions for target archery.
It has worked very well at taking the handshock out of the grip and dampening vibration and works very well at quieting the bow, I will be using it also for bowhunting this year.
I have used the Parker line of stabilizers, Doinkers and Vibracheck but have found this one from Carbon Impact to work the best on the Parker UL31 and the Phoenix 34 for me.