80MM V-GROOVE RECESS MOUNT (LOW PROFILE) SLIDING GATE WHEEL WITH SUPPORT & TWO SEALED BEARINGS;280-KG LOAD CAPACITY; COMPATIBLE WITH OUR ANGULAR ‘V’ GROOVE TRACK; 2 X 6204 2RS SEALED BEARINGS; EASY INSTALLTION; ZINC COATED; TESTED UPTO 1.5 MILLION CYCLES.