Example Part Number:- CP5200-806S4 (Black PTFE paint finish)
Example Part Number:- CP5200-806S4R2 (Red Gloss paint finish) 

Position of inlet adapter - 'S' = Side feed.

Anti-Knockback spring strength - '0', '4' or '7' denotes the load of spring fitted. 

'0' = no spring fitted.
'4' = 4 lb (18N) spring (fitted load).
'7' = 7 lb (31N) spring (fitted load) 

Colour of Caliper - 'R2' = Red Gloss paint finish