It pains me to only give three stars on this review as the actual product is a most definite 5 star rating. I use them on my 850b and my 16m Beatsmaster and they’re absolutely excellent. However there was an item missing from my last order, I sent an email as soon as I opened the package stating this and I have heard nothing from the company. Hence only 3 stars, 2 stars deducted for poor customer service. Otherwise the actual product I have no hesitation in highly recommending for protect your pole joints.