Staywell Infra Red Collar Key 580 is ideal for homes with multiple cats or as a replacement collar. Compatible with Staywell infra-red 4 way cat flap. Access key collars are available in green, pink and yellow, for Infra-Red Cat Flaps 580 by Staywell is ideal as a replacement or additional collar for multi-cat homes to access your Staywell Infra-Red Cat Flap. Please be aware to purchase the correctly coloured Infra-red Key Collar, as it will only work with Infra-Red Cat Flaps which originally came with a coloured access key. Access key colours, green, pink and yellow. Dimensions: 2.9 x 1.8 x 2cm.