Dubro PN 789 recommended for .35 to .50 planes. Top width is 3 and 7/16, height is 4 and 1/2, overall width is 14" This is the gear most of my local 4*60 buds use on their planes with good results. I just picked one up for mine this weekend for $13.35 at my LHS. One friend did a bucket job on his 60 and the gear still survived fine. He's using it on the replacement plane.

Dwight