Used on direct vendor delivery (dvd), atec at422-t, nsn: 3810-01-448-2619, cage 12361, part number 1-140-0-00513, tm5-3810-307-24p, contract daae07-97-d-x001. 1-5/8 in. dia; 1/4 in. wide; bendable; hardened oil-impregnated sintered iron rollers; adjustable from 7/8 in. to 4 in. lg