Quiet transparent cat flap with safety lock the flap protects against drafts with a special magnetic seal with optional tunnel parts available to expand the depth to 34 mm each additional tunnel part expands the tunnel only up till apprx 25 mm as the parts must be slid onto each other freecat de luxe trixie cat flap at a glance installation depth up to 65 mm total size 21 x 21 cm opening 162 x 17 cm for all doors and walls made from waterproof plastic magnet clip and sealed against draf