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):1/2,1,2,3,4,5,6,7,8,9,10,12,14, 16,18,20, 25,30,35,40,45,50Total:23 pieces including one red filter lensMaterial:AcrylicPackage: Aluminum Case loose prism