Loose prism mounted on a stainless steel stick Diopter:1/2,1,2,4,6,8,10,12,15, 20,25,30,35,40,45,50 Loose prism mounted on a stainless steel stickDiopter (Δ):1/2,1,2,4,6,8,10,12,15, 20,25,30,35,40,45,50Total:17 pieces including one red filter lensMaterial:AcrylicPackage:Aluminum Case loose prism