... 404,501,502,504,P504 serialD is the position of the handle (looked from the positive direction)"D ... E"is the left handle.A is the diameter of roll,Uni:mm "A"means the roll diameter ... the roll diameter is ø40V is the type of roll ,we have V,U,K,Three types ... wire0.8/1.0 is the trough dimension of roll ,Unit:mm the figure same as the ... 6/2.0,2.0/2.4the drawing of the P504A: Plastic casting feed frame