uxcell&reg; Aluminum Step Up Lens Filter Ring Stepping Adapter 49mm-52mm Product Name : Step Up Adapter Ring;Material : Aluminum Male Thread : 49mm / 1.9";Female Thread : 52mm / 2.0" Size(Approx) : 55 x 6mm / 2.2" x 0.2"(Max.D*H);Color : Black Weight : 6g Package Content : 1 x Step Up Adapter Ring