Posted about this a while back. After picking up the 1960A HW 4x12 Cab to go with my 1959 HW Head I noticed the cups on the bottom of the cab ( that the casters screw into ) were made of plastic and wouldnt have been back in the day. So I had some made at a Local Machine shop out of Bearing Bronze. Now these may not be like the origionals in any way but the material is in keeping with what they would have been back then. Also there will be no worries about breaking these while moving the Cab. So heres some Photos. The Plastic Ones First.