... :titanium or customer demand Overhead Concealed Floor Spring Door Closer (BL700)------ can be used on the ... door top spring, Concealed Transom Closer 1,All floor spring have passed over 500,000 opening-closing tests,Internal ... is applicable to all weather installation.3,The door can be opened by max 105' and ... with double-stage adjustment.4,Maxinum door wight is 110kg,door width is 1200mm.5,Suitable for ...