The 6702ZZ bearing is a Thin section bearing with an inner diameter of 15 mm , an outer diameter of 21 mm, a width of 4 mm. It typically uses ABEC1 ABEC3 ABEC5 grade precision tolerances and 6702 OPEN 6702ZZ 6702-2RS 6702-2RZ type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.