The robust construction and security locking panel are popular features of all Dog Mate doors. The medium door is suitable for Spaniels, Terriers, Poodles, etc. up to 18 (460mm) shoulder height. For dogs up to 18 (460mm) shoulder height Self lining to 2 (50mm) thick - ideal for all doors and walls Robust security locking panel Weatherproof flap with vision panel Lightweight flap may be used by cats Silent Action - won?t frighten pets or disturb owner Draught and weatherproof brush sealed flap with magnetic closure Transparent flap Lifetime parts service 3 Year Guarantee Overall size: 113/8 x 133/4 (290mm x 350mm) Cut out size: 91/2 x 113/4 (242mm x 300mm) Available in Brown (215B) Grey (215G) and White (215W)