Comparison : Item # 0012-6636, Die Centering Disc with 3.65" (92.7mm) aperture and 4" OD
Item # 0012-6637, Die Centering Disc with 2.15" (54.6mm) aperture and 4" OD
Item # 0012-6638, Die Centering Disc with 2.85" (72.3mm) aperture and 4" OD
Item # 0012-6625, 30 Ton Air-EZ™ Press - Air Powered, high profile with 8 1/4" daylight
Item # 0012-6628, 40 Ton Air-EZ™ Press - Air Powered, high profile with 8 1/4" daylight