Manufaturer Part Number: SOJ41001Sig's juliet4 magnifer has a powercam 900 mount for fast transitions from close quarters to intermediate range targets.The front thread-in lens protector and rear flip back for protection from the elements.It is constructed of aircraft grade cnc aluminum which ensures a lifetime of reliable service.Magnification: 4xObjective: 24mmField Of View: 6.25 DegreesEye Relief: 2.50"Length: 4.20"Weight: 12.50 ozFinish: BlackProofs: Waterproof