Adams Ans-R-Gram Message Reply Unit Sets, 7.44 x 8.5-Inch, 3-Part, Carbonless, White/Canary/Pink, 50 Sets per Pack (NC3875-50) 3-part carbonless (white, canary, pink paper sequence) When a response is needed from receiver, sender keeps part two before sending Receiver writes response and keeps part one and sends part 3 back 50 sets per package - 7.44 x 8.5 inches SFI Certified