Inside Dimensions 3-1/2" L x 1-5/16" H

There is no seal wear

plus a composite base

1 has an offset adjustable cam bar of 3/4" to 2-3/8"

Hebbell PC100 Male Closure Cap

Mabru Power Systems (MPS) Marine Air Conditioning Fan Blower Insulated With Capacitor 5000 BTU - 230v Raritan Inside Dimensions 3-1/2" L xThe Mabru Power Systems (MPS) Marine Air Conditioning Fan Blower is insulated and features five ball bearing speeds for high static pressure in either horizontal or vertical positions. An auto mode with the included round duct adaptor flange ensures a more compact installation footprint, while delivering greater installation flexibility.