1)smaller roller ,2 kinds of profile slat 2)4 roll up types 3)20 years experience 4)strong and easy installation Pick-up roller shutter doors is the most competitive products of our factoryPick-up roller shutter doors part no.:104000Pick-up roller shutter doors material :aluminumPick-up roller shutter doors treatment: oxidePick-up roller shutter doors color: coca cola red, coffee, dark ,army ...