The RRT4 Red Magnetic Reflective Target for Pacific Laser Systems Lasers is a versatile laser accessory that is perfect for monitoring jobs. Used for quick red laser alignment, the RRT4 is compatible with the PLS 3R, 5R, 6R, 180R, FT90, H2, or the HV2R lasers. In addition, it only weighs 0.6 pounds and has a size of 5" L x 3" W x 2" H. Plus, this magnetic target can easily attach to steel beams and metal supports.