The rollers 27 are of conventional design comprised of a ball 63 mounted in {TAIL ~ a base} 65 which includes a mounting flange 67 through which {HEAD ~ cap screws} 61 are journeyed to be secured in the respective channel member 
The rollers 27 are of conventional design comprised of a ball 63 mounted in { TAIL ~ a base } 65 which includes a mounting flange 67 through which { HEAD ~ cap screws } 61 are journeyed to be secured in the respective channel member
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH