In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. The Cavallaro tuba mouthpiece roll is now available in two configurations, a 2 slot, and a 4 slot roll. It is made of a nylon shell with a wools lamb interior to protect your mouthpieces. Two strap loops are added to the back of the roll for your option to attach the mouthpiece roll to the shoulder strap of your gig bag if you so desire. They are designed with plenty of room for any size tuba mouthpiece. Start protecting your investments today!