Magview S1 Mini Spotting Scope Adapter Self-Centering Disc. Its compact magnetic mount fits most 4250mm eyepieces providing a lightweight durable and easy-to-use solution in the field. Specifications for Magview S1 Mini Spotting Scope Adapter Self Centering Disc: Manufacturer: Magview Fit: Eyepiece Sizes 38mm-49mm Tube Diameter: 42 mm Attachment Type: Magnetic Features of Magview S1 Mini Spotting Scope Adapter Self Centering Disc: Magview phone plate is not compatible with wireless phone chargers Self Centering Disc Simply flip open the S1 cap connect your device to the magnet with the included Magview phone plate position camera and ready to film Package Contents: Magview S1 Mini Spotting Scope Adapter Self Centering Disc SYNC Auto-Aligning Phone Disc Alignment Tool Spotting Scope Adapter Sizing Rings Eye-Relief Spacers Phone Plate Magview 82051: S1 Mini Spotting Scope Adapter Self-Centering Disc