FEATURES * Rugged 1” (25mm) square tubular steel frame * Durable abrasion resistant baked on Black Powder coat finish * ½” (13mm) diameter steel axle * 8” (203mm) semi-pneumatic or 8 ¾” (223mm) pneumatic rubber tires * High grade ball bearings with hardened cup designed as an integral part of wheel; pregreased & sealed for long service life & easy rolling