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#SR70 - 31" Between Frame Rollers On 3" Centers Model Length Weight SR70-31-03-05 5'-0" 331-lbs. SR70-31-03-10 10'-0" 646-lbs. Rollers On 4" Centers Model Length Weight SR70-31-04-05 5'-0" 267-lbs. SR70-31-04-10 10'-0" 519-lbs. Rollers On 6" Centers Model Length Weight SR70-31-06-05 5'-0" 203-lbs. SR70-31-06-10 10'-0" 391-lbs. Rollers On 9" Centers Model Length Weight SR70-31-09-05 5'-0" 178-lbs. SR70-31-09-10 10'-0" 328-lbs. Rollers On 12" Centers Model Length Weight SR70-31-12-05 5'-0" 138-lbs. SR70-31-12-10 10'-0" 264-lbs. Extra Rollers Model Length Weight SR70-31-XR 31" BF 12.9-lbs. Optional Structural Frame Model Length Weight SR70-31-ST-05 5'-0" 5.4-lbs. per foot SR70-31-ST-10 10'-0" 5.4-lbs. per foot Series SR70 - Rollers On 3" Centers Series SR70 - Rollers On 4" Centers Series SR70 - Rollers On 6" Centers Series SR70 - Rollers On 9" Centers Series SR70 - Rollers On 12" Centers