internal blinds /Venetians

internal blinds /Venetians thickness:3+19A+3,5+19A+5 and so on 2 pcs tempered glass on both side! Features: a.Excellent noise insulation performance,energy conservation and environmental protection. b.Excellent fir prevention,water proof,dustproof,and lampblack,the performance of the frost prevention frozen. c.Safety,durability,economical and practical,used more often new. Specification windows with internal mini blinds A.control system: a.electrical remote control system