Detailed Product Description 1. Optical glassType: KZKBaKHBaKFZFAvailable specificationsSpecifications available: board, block, stick, strip, ball, second model etc.Usage: to be used as optical parts of the telescope, microscope, camera, guns aiming scope, and measuring instruments, analyses instrument etc. 2. crystalloid Crystalloid glass: lead Lead crystal glass, also known as man-made crystal, ...