Foshan Da Sier selling hand-cranked windows device

Product name: Manual windows Product Number: RDS Features: suitable for operating high windows, top hung windows open independent; at 180mm ~ 360mm is normally open from hanging in the window opening at the maximum 600mm; maximum push / pull: 250N ; standstill locking force of about 100KG; mounted on the wall or window frame can be; the hand is a unique effort designed to make ease of operation; a flexible and convenient use of solid stainless drive rails to bend metal and stainless steel metal pipe, Let hand installation position to have more choices.