... approval 3. ISO9001 quality certificate 4. OEM requires optiona Air Conditioner CoilRefrigeration manifold, copper pipe manifold, copper distributor, ... coil manifold, air conditioner coil manifold, copper manifold, air conditioner coil, air conditioner coil, a/c coil, ... is 90°, the tolerance is ≤ ±1.5°. The vertical tolerance of the section is ≤ 3°. The circular tolerance ...