You are purchasing a set of two (2) mounts for dichromatic optics (lenses not included) for construction of an RGB laser system. Size is 12.5 x 19.8 x 30mm ( L x W x H ) Installation glass size is Φ15mm x 2mm Center high = 17mm Aluminum construction.

Set of two (2) RGB Laser Combination Lens Mount Holder Φ15mm -l [AX-DCRMT-