According to the installment requirements, we will generally provide the bearing type, and the through-bore hole type. 1. The customers who are familiar with slip rings can select the appropriate models according to the catalogs supplied. If the model you need is not contained in the catalogs, please offer us your technical requirements, and our engineers will design for you specially. 2. The customers who use slip ring for the first time can contact our engineers, and they will solve your questions.