Gas Strut Lift Support: Support opens lids to a maximum angle of 100 degrees. Lids soft open gently,Ideal for supporting the lid to keep it open. Stable No Rusty: gas struts is made of copper core with zinc plating, which prevents from rusting even aftering using for a few years. Install the nail plate and insert the ball into the plastic hole. You can remove the metal clip with a screwdriver or a screw when you need not to use. Pressure:120N/26lb/12KG (Per Strut);Length ( hole center to hole center) :9-11/16;Travel:3-14/25 ,Distance between ball mounts compressed: 6-1/8. It is suit for heavier kitchen cabinet, bedroom trunks, toy box or storage box under window bench seat as well as folding table for RV. Soft Open/Close Ideal choice for toy box in kids room. When the child opens or closes the doors or lids with these struts on, the lids will not pop out or slam down heavily, No worry to slam shut to be hurt. Product Specification Pressure: 120N/26lb/12KG (Per Strut) Color: Silver Material: Copper Core, Zinc Plating, ABS Head Total length: 10.6 (270mm) Travel: 3.3 (85mm) Size: Please refer to the picture Shaft Length: Approx. 9.65in (245mm) Shaft Diameter: Approx. 0.59in (15mm) Open angle:80-100 degrees. Package includes: 2 x 120N Gas Spring Hinge, fixing screws, installation instructions.