The Staywell 940 Tunnel Section is designed for use with the Staywell 919 4-way locking cat flap. Each tunnel section is 7/8" wide. Use the 917 and 940 tunnel sections for a wall mount of any thickness.

You could add a Staywell 940 Tunnel Section to a Staywell 919 to make it self-framing for a door. However, a better choice is to purchase the Staywell 917 which is self-framing from 0"-2" and adequate for nearly all doors so that no additional tunnel section would be required in that case.

Staywell Tunnel Extensions
(one tunnel section per box)

Staywell 940 Tunnel Extension for 919 Cat Flap
(one tunnel section per box)

Tunnel Extensions for Staywell 300, 400, 500 and 919 Cat Flaps

Stock Number	Fits Pet Door	Price	Buy
04SW310	Staywell 300, 400 & 500	$699
04SW940	Staywell 917 & 919	$599
Warranty

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