Apexstone Soft Close Lid Support,Safety Lid Support,Soft Down Lid Support,Soft Close Lid Hinge(33 lbs),Set of 2 Lids lower gently,Ideal for SOFT CLOSING lid to prevent from slamming so that it won't smash kid's fingers Force:33 Lbs(150 N),Length (Center-to-Center): 8.7 Inch(220 mm),Extended Length (Center-to-Center):14.2 Inch(360 mm) SOFT DOWN the door/lid which the SIDE LENGTH is between 10 and 30 INCH, the WEIGHT is between 10 and 30 LBS As the Installation,the measurements are 3 1/2 Inch /90 mm from the back of the lid, 7 5/8 Inch/195 mm from the back of the cabinet, and 8 5/8 inch/220 mm from the bottom of the cabinet. While if unfortunately you feel it's too weak,you can move the mounting point on the lid 20 mm(0.79 inch) towards the opposite direction of the hinges, OR you can move it on the cabinet 20 mm(0.79 inch) towards the back of the cabinet We offer 1 YEAR 100% SATISFACTORY WARRANTY, if unfortunately our SOFT DOWN LID GAS STRUT did not work well ,please kindly contact us for exchange, refund or return