TB-H4S-40-DK-2 – DUCT KNIFE + SHEATH
ToughBuilt duct knife with sheath. Dual-edged blade — fine and serrated sides. Full steel tang for durability. Cuts duct board, insulation, and flex duct.
Walk in. We test every part free at the counter. Open to homeowners, contractors, and multifamily — no account or minimum order.
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Ten departments, organized the way our counter is. Every category is on the shelf today.
Bring your old part. We'll diagnose it, find the replacement, and bench-test the new one at the counter before you leave — so you only make one trip.

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ToughBuilt duct knife with sheath. Dual-edged blade — fine and serrated sides. Full steel tang for durability. Cuts duct board, insulation, and flex duct.

16″W x 20″T return air grille with fixed louver blades. White powder-coated steel. Mounts on wall or ceiling over your return duct opening.

Malco R308 pocket-size deburring tool with hardened steel blade. Cleans burrs off 1/4″ and larger copper tubing after cutting. Essential for clean brazing joints.

1/2″ ACR copper 90° long radius elbow (C x C). Wrot copper for brazing. Changes direction of refrigerant lines without restricting flow.

Resideo VR8345K4809 universal electronic ignition gas valve. Works with intermittent pilot, hot surface, or direct spark ignition. 24 VAC.

Honeywell L4064B2210 fan and limit control with 11-inch element. Adjustable fan differential and fixed high-limit safety cutoff. For older furnaces without electronic controls.

12-inch ductboard triangle made from insulated fiberboard. Used to form 90-degree turns and transitions in ductboard systems. Fits standard 12″ duct runs.

10″W x 6″T 2-way supply register with stamped steel face. White powder coat. Built-in multi-shutter damper for airflow control. Wall or ceiling mount.

Goodman .052″ fixed orifice piston for 1.5-ton systems (R-410A). Controls refrigerant flow in Goodman and Amana condensers. OEM part.

York S1-02530801000 OEM flame sensor for York, Coleman, and Luxaire furnaces. Factory original part with ceramic insulator and stainless rod.