• Featuring Six Accurate Prisms
• Prism Constant: -7mm.
• 5/8” Thread at Top and Bottom
• Centring Accuracy: ±2.0mm (ATP1)
• Centring Accuracy: ±1.5mm (ATP1M)
Model No.: ATP1: Nylon and TPEE Frame, without Core Axis
ATP1M: Metal Frame, with Core Axis, with Adapter
