Reusable MNPT anodized aircraft aluminum fitting Spiral bend restrictor - Increases hose flexibility Allow you to quickly repair Flexzilla hose using 2 wrenches Works with 1/4 in. Flexzilla and Flexzilla PRO air hose Barb Size: 1/4" Legacy RP900250 Flexzilla Pro 1/4" Male NPT Reuseable Fitting. Flexzilla Pro Reusable Fittings and Splicers allow you to quickly repair Flexzilla hose on the job site, or create a custom length hose in just three easy steps. 1). Cut damaged portion of hose at 90 degree. Slide fitting nut onto hose. 2.) Slide hose onto fitting until hose reaches threads. 3.) Tighten fitting nut until snug.