18FT Stainless Steel Braided Propane Hose Extension Assembly with 3/8" Female x 3/8" Male Flare for Gas Grill, RV Fire Pit18FT Propane Extension Hose Assembly with 3 8" female x 3 8" male flare fittings. Key Features: 304 stainless steel braided hose assemble with inner tubing made of flame resistant material and solid brass fittings for safety and durability standard 3 8" female x 3 8" male flare fittings Compliant with ANSI Z21. 54 CSA 8. 4 Working pressure 0 350PSIG Outdoor use only

Constructed with steel with step down structure

While typical water supply pressure ranges 50 - 80psi

actual outsize overall dimensions is 10“ wide by 10” high

• Wide Range of Applications – Suitable for gas water heaters

The Listed size 16"wx20h" is for inside duct opening measurement

The hose assembly is 6 ft long

Size selection guide: 1) take the vent cover off the wall or ceiling

If your duct opening size is 12” x 12”

Engineered and built to last

The Listed size 14"x24" is for inside duct opening measurement

Two layers PVC core with reinforced nylon in between and 304 stainless steel braided outer cover for high performance and durable water supply applications

the 8" x 8" is the listed size