PCTC Eyepiece Eye Cup Camera Viewfinder FDA-EP12 for Sony Alpha A57 A58 A65 A77 SLT-A77 SLT-A77L SLT-A77M SLT-A77Q SLT-A77V A77 DSLR SRL good quanlity,hard Plastic,it can be used a long time The design helps to block out unwanted light, providing more detail while looking through the viewfinder hardstrong,don't lost