This meniscus focusing lens is a high-precision optical component engineered to tightly concentrate the parallel laser beam from the collimator into a pinpoint focal spot for precise cutting. Designed to fit original RayTools laser heads (such as BM110, BM111, and BT240S), this 30mm diameter lens with a 155mm focal length handles power outputs up to 3.3 kW. Made from premium fused silica, it ensures maximum structural integrity and minimal thermal distortion of the laser beam during high-power operations.