Adjustable Flip Calendar Rod: this classroom calendar holder set can be adjusted from 16 to 28 inches to meet different usage and suitable for any like whiteboard, refrigerators and etc. Great for Classroom Flip Calendar: the adjustable rod made from plastic material, while the loose-leaf rings are designed with metal, easy to assemble and sturdy, great for holding up the day of the week, month, and date cards on classroom whiteboard. Easy to Install: just pass the calendar card through the loose leaf rings, tear off the sticker of rod brackets, fix the brackets in the position you want, and finally fix the loose-leaf ring on the holder. Widely Application: the rod can be adjust from 16 to 28 inches, perfect for calendar, anchor charts, date cards, crafts, decor pictures, etc. Color: White Material: plastic Package Contents: 1 x Flip Calendar Holder 8 x rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.