TOPOG-E Gasket Co.
TOPOG-E T1260-OBR-S0180 2-3/4" X 3-1/2" X 1/2" Elliptical Handhole Gasket
You will find that the side handle assy makes lifting this equipment much easier on your back.
TOPOG-E T180-2-1/2 x 3-3/4 Or 2-3/4- 3-1/2 x 1/2-OB Oblong Handhole Gasket
You will find that Hzutloer products ship quickly from most online retailers.
TOPOG-E Gasket Co. T180-3-1/4 x 4-1/2 x 9/16-OB Oblong Handhole Gasket
What I like about ABB is the straightforward programming interface.