Twister 2GR card holder is indispensable at the time of hatching, to record all the information about the hatching such as the RNA of the couple, the number of eggs, the laying date, number of rings, etc. .. The card holder hooks directly to the cage or to the aviary. The card holder is sold individually and equipped with a 4-color card for ready use.

Possibility to purchase other Cards at 4 Cove Hobby Nature Ornithology for annotations, packs of 15 cards.

Dimensions: 12.5x10.5x1.2h