Butler Creek Flip Open Scope Cover Eyepiece Size 05 By Butler Creek Product Overview now offers Butler Creek Flip Open Scope Cover Eyepiece Size 05. The Butler Creek Flip Open Scope Cover Eyepiece Size 05 is a great choice to protect your scope. The Butler Creek Flip Open Scope Cover Eyepiece Size 05 make an airtight seal to prevent the elements from distorting your optics. The Butler Creek Flip Open Scope Cover Eyepiece Size 05 fit most scopes with a 33mm objective. Fits 33mm objective Durable hard plastic construction Airtight seal