Phone holder compatible with Schwinn Airdyne Classic exercise bikes. Important details: -These phone holders are custom designed to be mounted in the single screw hole on top of an Airdyne display. You may already have a screw there. These are very common Airdyne displays, for example on brown and white models, but be sure you have one with that screw hole. -This purchase includes a screw to mount the phone holder (this screw fits many Airdyne displays). Use the original screw if your Airdyne has one. -I 3D printed these myself. The finish turned out well, but they are not "factory level" finish as you can see by the photos. There are some imperfections. -The phone holders measure 166 wide x 140 high x 29 deep millimeters. 166 mm wide safely fits between the arms on the Airdyne classic bikes. -The purchase includes 1 phone holder and 1 screw.