These Vacuram central vacuum bags are manufactured to work best with various OVO, Husky, and Nadair models that require the 22.5 litre bags (up to 6 gallons). The compatible models include the OVO 700 series, OVO-700ST-35H, Filtre 186 for Husky Storm, Eclipse, Equinox, Pro, Titan, Nadair and Other Central Vacuum Systems. The tear-resistant material offer superior filtration and dust capture via it's 3-layer design, while offering balanced suction efficiency. Note: The model numbers and manufacturer names/brands are mentioned to demonstrate compatibility only.