Automatic door closer SL4000 Suitable door weight: 25~150kgs Suitable door width:less than 1200mm (1)Elegant and beautiful in appearance ... and latching can be adjusted.(3)When the door open to 65 degree,the door closer have back check function,and the function ... is adjustable,backcheck,delayactionSL4000(heavy duty)29747571928060kg~150kg≤1200 Automatic door closer SL4000,25~150kgs,big body series