[Wide Application]:1000Pcs 7 3/8 x 3 3/8 Universal Monthly Time Cards are compatible with most punching time clocks and widely used in office 6 Columns of morning afternoon & overtime in/out punch cycles for classifying specific time periods [Double Sided]:2-Color double sided card includes blue front side and orange back side for easy distinguishing front side for marking day 1 to 15 and back side for marking day 16 to 31 [Easy to Use]:Just insert the time card into the card slit of the time clock and you can use the machine to record time to calculate regular hours extra hours deductions net pay per month etc [Applicability]:Applicable to our time clock model YES0499 any inquiry is welcome