The ProLens 37mm Adapater is designed to thread directly onto the front of the Replay XD720 HD Video Camera, Use it to attach a 37mm lens filter for truly professional results Constructed from high grade aluminum, the adapter threads on smoothly and includes an O-ring to keep the elements out, Fits the Replay XD720 Video Camera, Aluminum construction, Compatible with most 37mm lens filters, SKU: RLYX014