Replacement door truck with blade spring type for aluminum sashes sold by KAKEN Stainless steel is used for the main body, so it is resistant to rust, and the adjustment direction is on the side side. Door Size: Thickness 0.4 x Height 1.0 x Length 1.6 inches (9 x 25 x 40 mm); Effective Dimensions: Inner Width 0.4 - 0.5 inches (9 - 13 mm); Compatible Bottom Window: Parallel Type; *KAKEN shows the rail and frame models as below. Rail type notation: Staircase, parallel, cut hole type; Frame type notation: R type (round), F type (flat), H type (co-type); *9 (F)24 is 9 (F)20 due to the change of the model. [Caution] *This product has a very severe variation in manufacturer inventory. We apologize if we run out of stock. (*If there is stock, it will be shipped out within 1 business day from the start of the arrangement.) *Kaken sales are currently putting effort to create a chart for compatibility with existing doors (Refer to the official website of the manufacturer). If not, please contact the manufacturer with the door information before replacement.