Google cardboard kit contain:Lens x2Rubber band x1With bands to fixed on your headtech specsPre-cut cardboard VR kitGerman designed Biconvex lenses (same as Google I/O lens)Less than 5 min. assemblyBi-convex��Diameter 25mm��Focus Length 40mm，Machine Cutting Mould ( Not hand-cut or laser-cut )Package includes:1xGoogle cardboard kit