... with heat pipe 3)certificate:solar keymark,CE,SGS,SRCC Specifications:aluminum fin for Solar collector with copper heat pipea) dimension of vacuum ... ) and AL-N/AL (signle target) ,which depends on customer`s requirement.k )Certificates:ISO9001-2008,CE,Keymark ,SRCC , CCC , SGS ... or exchange due to original quality problems aluminum fin for solar collector with heat pipe