Genuine Cokin P121M P Series ND4 Graduated Grey Neutral Density Filter

This is a new Cokin ND4 No P121M Grad P series Filter. What are Cokin filters made from?. CR-39 Organic Glass: All Cokin filters are manufactured from CR-39 organic glass - originally launched for the vision lens industry, CR-39 organic glass boasts several major features.

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