A1) 38 Diameter x H30 A2) 38 Diameter x H30 with 1-24" center extension B1) 42 Diameter x H30 B2) 42 Diameter x H30 with 1-24" center extension C1) 48 Diameter x H30 C2) 48 Diameter x H30 with 1-24" center extension D1) 54 Diameter x H30 D2) 54 Diameter x H30 with 1-24" center extension E1) 60 Diameter x H30 E2) 60 Diameter x H30 with 1-24" center extension