Comparison : Item # 01-82M-30, 82-M Series: .312 MTG Hole Both Ends(.250 Min Chassis)
Item # 01-82M-40, 82-M Series: .312 MTG Hole Both Ends(.250 Min Chassis)
Item # 01-82M-60, 82-M Series: .312 MTG Hole Both Ends(.250 Min Chassis)
Item # 01-82M-80, 82-M Series: .312 MTG Hole Both Ends(.250 Min Chassis)
Item # 01-82M-100, 82-M Series: .312 MTG Hole Both Ends(.250 Min Chassis)