... glass 3.high avaition aluminum 4.delivery fast wide angle lens decription;37mm 0.45x wide angle lensMount thread: 37mmFront filter ... thread: 49mm0.45X AF digital wide angle lens with Macrotwo elements and two groups 2-2 macro High ... case includewe can according to customer demand to development the lens .OEM is welcome .available size :37mm,52mm,55mm,58mm,62mm,67mm ...