Buy & Sell Listing - Want to TradeTrading Cokin A Filter Ring (49 for 52mm) Location Pittsburg Ships to USA Description Hey All, Know it may be a long shot, but have some Cokin A filters and found myself with double of one size, and needing another. I have a 49mm filter ring that I hope someone could use for getting a 52mm filter ring in return. Figured I would drop it into a USPS envelope, and you could do the same. Again, this is for the A or "Snap" filters, not the P. Note, I would primarily be interested in genuine Cokin rings (says France on them) as opposed to knockoffs. References - Acknowledgment I have read and agree to the Buy and Sell rules.