Attributes . Initial Resistance @ 300 fpm . Values

0-15 " WC (1)   0.08 in wc (8)   0.10 in wc (53)   0.13 in wc (51)   0.13" WC (1)   0.14 in wc (195)   0.14" WC (3)   0.15 in wc (16)   0.16 in wc (6)   0.17 in wc (17)   0.18 in wc (86)   0.19 in wc (112)   0.19" WC (13)   0.20 in wc (596)   0.21 in wc (26)   0.22 in wc (397)   0.23 in wc (24)   0.24 in wc (20)   0.24" WC (13)   0.26 in wc (4)   0.27 in wc (39)   0.27" WC (12)   0.29 in wc (7)   0.30 in wc (25)   0.31 in wc (15)   0.32 in wc (2)   0.33 in wc (42)   0.34 in wc (6)   0.36 in wc (2)   0.38 in wc (10)   0.39 in wc (20)   0.40 in wc (4)   0.41 in wc (1)   0.45 in wc (6)   0.48 in wc (19)   0.50 in wc (6)   0.59 in wc (2)