Aluminum Camera Step Down Filter Ring Stepping Adapter 52mm-42mm Black Product Name : Step Up Adapter Ring;Material : Aluminum Male Thread : 42mm / 1.7";Female Thread : 52mm / 2" Size(Approx) : 54 x 6mm / 2.1" x 0.2"(Max.D*H);Color : Black Weight : 14g Package Content : 1 x Step Up Adapter Ring