Quote: (Originally Posted by
Shaunzxr)

Very Hard to tell, I think the one on the right looks promising.
Thanks for your help
Will mail SAP see what they say
Do you actually have the cylinder with you, a photo would clarify it, but
http://http://www.bocmedical.co.uk/product_information/Cylinder_data_chart.pdf
would imply that there is simply some confusion regarding the gender of the fitting, perhaps SAP are differnt.