Post Office Box

Post Office Box

       Post Office Box – Physics Equipment

• Post office box in export quality.
• And then with brass block , plug key, having 3 pairs of ratio coils – 10, 100, 1000 and 16 series constant wire.
• All plug are interchangeable with accuracy 0.1%
• Constant coil standard teak box ½” 3 ratio.
• And with managing coils ½” blocks.
• Most superior brass block 9/16” manganian coils.
• With 3 ratio coils.
• with 4  ratio coils.