High Compatibility with Viega Vanguard / Manabloc Systems – Precisely fits MBS136R 50601 valves, reliably turns off PEX manifold shut‑off valves. OLD AND NEW STYLES APPLY:Red water valve key compatible with Viega Vanguard old-style 1/4” x 5/16” male diamond stem pins,Blue water valve key compatible with Viega Vanguard new-style 3/8” x 1/2” male diamond stem pins Compatible With Viega ManaBloc distribution manifold Model V5030 V5030.2 V5040ZL V5043ZL V5030ZL;Compatible With Viega MiniBloc zoning manifold Model V5031 V5050ZL V5065ZL;Compatible With Viega PureFlow MiniBloc zoning manifold Model V5650 V5660 V5667;Compatible With Viega ManaBloc supply adapter Model V5035ZL. Sturdy T‑Handle Design – Forged steel core and ergonomic red grip for maximum torque and comfort in both tight spaces and easy operation Package:T-handle Key*2 Keyring*2 Water Valve Key Compatible with Viega Manabloc New Style and Older Style Red +Blue Key Set Our premium T-handle valve key designed specifically for Viega Vanguard/Manabloc PEX manifold systems. Precisely fits modern MBS136R 50601 valves for reliable operation. Made from premium PETG, this key provides strong torque output and a comfortable feel. Unlike some third-party products that may not fit the dimensions, our key is precision engineered to not be too loose or too tight. Ideal for installers, technicians, or home users for maintenance or emergency shutoffs on PEX manifold systems. Rust-resistant and durable, it is suitable for long-term use in wet environments.