| The Staywell 30 is ideal for single-glazed and thinner doors. The transparent flap is operated by a single 9v battery and activated by a 'personal' collar key which will only let your cat pass! Select one of 4 setting: in and out; in only; out only; or locked. Upgrades safely to main-electric operation with an optional transformer. Overall size 223mm x 223mm. |  |