HYTROL Gravity Roller Conveyors feature rugged steel rollers, labyrinth-sealed with grease-packed bearings. All frames are painted and have butt couplings for easy assembly of sections. Many configurations allow customized system. NOTE: Delete 1" from “between-rail width” for actual roller width. 2-year warranty. Made in USA.1.38" DIA. x 18-GAUGE rollers have 1/4" dia. hex shafts, 45-lb. capacity. Rollers are set 1/4" above frame, which provides 250-lb. capacity per foot in 5' sections, 31-lb. capacity per foot in 10' sections. 12-gauge frame is 2-1/2x1".1.9" DIA. x 16-GAUGE rollers have 7/16" spring-loaded hex shaft, 250-lb. capacity. Rollers are set 1/4" above frame, which provides 620-lb. capacity per foot in 5' sections, 135-lb. capacity per foot in 10' sections. 10-ga. frame is 3-1/2x1-1/2".2.5" DIA. x 11-GAUGE rollers have 11/16" spring-loaded hex shaft, 750-lb.capacity. Rollers are set 3/8" above frame, which has 1620-lb. capacity per foot in 5' sections, 350-lb. capacity per foot in 10' sections. 4-ga. frame is 4x1-5/8".