This air cylinder has a 12mm bore and 10mm travel.
Ports are M5.
For availability of Metric (mm) fittings see:
http://www.kkdepot.com/product.asp?key=917
For availability of English (inch) fittings see:       
http://www.kkdepot.com/product.asp?key=918       
This item is used - in like New condition - with 90 day Warranty.       
Actual picture of item. 
For availability of proximity switches see:       
www.kkdepot.com/Default.asp?keywords=d-f9p&action=allwordsearch       
Price $42.00 each (7 available)