Eyepiece protection cap for eyepieces of TSN-99/88/66/55/880/770 series spotting scopes.For eyepiece models: TE-11WZ II/ 11WZ/ 10Z/ 17W/ 20H) If you've lost a spare part such as a protection cap to your Kowa optic, fear not, we stock many of these parts in our service department and they are ready to ship from our warehouse. All spare parts are official Kowa products so you can be 100% satisfied that your optic remains in it's original state.