Both Arco and Arco II Coils are cross-compatible.

HORIZON ARCO II T6 REPLACEMENT COIL FEATURES:

• 3 Layer Liquid Guiding System – Flax Paper, Cotton, Flax Cotton
• 0.2ohm T6 Triple Coils – rated for 80-90W
• Parallel Vertical Orientation
• Stainless Steel Heating Element

HORIZON ARCO A4 REPLACEMENT COIL FEATURES:

• Organic Cotton and Flax Paper Wicking Properties
• Parallel Vertical Orientation
• 0.2ohm A4 Parallel Quadruple Coil – rated for 70 to 80W
• 0.2ohm A6 Triple Coil – rated for 80 to 90W
• Stainless Steel Heating Element

Comes in a 3 pack