The insulated tube - ACR connection tube, is the copper / aluminum / Cu+Al covered with insulation pipe, single or pair/twin type. Ends can be with flared nuts. Mainly for connecting the ACR indoor and outdoor units, also for some water or solar system, etc. Different material, Different advantages, as your choice.
  
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Type (O.D. of copper tube)
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Length (m)
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Remark
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1/4”(6.35mm) or 5 / 6mm
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1 -- 30
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All can be discussed
according to requirements!
If you want the flared-nut
ends, the length should be
not more than 10m.
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3/8”(9.52mm) or 8 / 10mm
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1/2"(12.70mm) or 12 / 14mm
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5/8"(15.88mm) or 15 / 16mm
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1 – 30
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3/4"(19.05mm) or 18 / 19mm
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7/8"(22.22mm) or 20 / 22mm
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1 -- 25
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1/4”(6.35mm)+ 3/8”(9.52mm) or 5 / 6mm+8 / 10mm
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1 – 30
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1/4”(6.35mm)+ 1/2”(12.70mm) or 5/ 6mm+12 / 14mm
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1/4”(6.35mm)+ 5/8”(15.88mm) or 5/ 6mm+15 / 16mm
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3/8”(9.52mm)+ 1/2”(12.70mm) or 8 / 10mm+12 / 14mm
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3/8”(9.52mm)+ 5/8”(15.88mm) or 8 / 10mm+15 / 16mm
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3/8”(9.52mm)+ 3/4”(19.05mm) or 8 / 10mm+18 / 19mm
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1/2”(12.70mm)+ 3/4”(19.05mm) or 12 / 14mm+18 / 19mm
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