Nitrous Express Nitrous Express 4AN Pure-Flo N2O Filter & 7 Stainless Hose (Lifetime Cleanable) - 15607 The Pure-Flo N2O Filter features a stone element filter that can be reused season after season. The Pure-Flow N2O Filter housing is crafted of Aluminum with both 4AN size inlet and outlet fittings. ... $100.99
