Size 2 Compatible with: Vortex: Razor UHD, All non-Japan made Vipers, Diamondback (Non-HD) 08x42, 10X42, Diamondback HD 10x50, 12x50. Swarovski: EL 8.5X42, 10x50, SLC 8x42, 10x42, Leica: Geovid Pro 8X32, 10x32 Trinovid BN 8X42, 10x42, Noctivid 8X42, 10x42, Ultravid 7X42, 8x42, 10x42, Duovid 8-12 Victory SF 8X42, 10x42, 2X42, Victory HT 8X42, 10x42, Conquest HD 8X42, 10x42 Terra ED 8X42, 10x42. Leupold: BX-1 McKenzie 8X42, 10x42, BX-5 Santiam HD 10x42, 12x50. Nikon Prostaff 3S 8x42, 10x42, Monarch 8x42, 10x42, Aculon 10X42. Maven B.1, B.2, B.6, C.1. SIG: Zulu 5, Zulu 7. Athlon Midas 8X42, 10x42. Steiner: Predator, Wildlife, XC. Kowa: Genesis Prominar 8.5X44, 10.5x44, BDII. Bushnell Legend 8X42, 10x42