This is one Lot (Qty. 20) of New Seiko Epson SG-636PTF Series Crystal Oscillator 27MHz, 5V. Part Number: SG-636PTF-27.0000MC0 in SMD 10.5x5.8x2.7mm Package.

Data sheet::

https://www.eea.Epson.com/portal/pls/portal/docs/1/1557446.PDF

https://media.digikey.com/pdf/Data%20Sheets/Epson%20PDFs/SG-636_PartNo.Guide.pdf