The cokin p series net filters are available in white and black grades 1 and 2 with 2 having the greater effect the black net filter softens fine details with no change in contrast while the white net filters not only soften details but also lower contrast this filter measures 85 x 85mm and fits the cokin p series holder cokin net filter chart cokin black net 1 is 143 cokin black net 2 is 145 cokin white net 1 is 142 cokin white net 2 is 144 maintains contrast softens detail adds a