LoPro High Efficiency Fittings LoPro High Efficiency Take-off - No Damper (GLPHET) Submittal PDF LoPro High Efficiency Take-off - Standard Damper 5/8" Hardware (GLPHETD) Submittal PDF LoPro High Efficiency Take-off - Standard Damper 5/8" Hardware with 2" Extension Kit (GLPHETD2S) Submittal PDF LoPro High Efficiency Take-off - Heavy Duty 2" Stand-off Locking Balancer Damper (GLPHETDHD) Submittal PDF Gasket Boot / Shoe Tap (GBTP) Submittal PDF