Sign In Quotes (0) MaxPro South > High Pressure Valves > High Pressure Check Valves > High Pressure Check Valves - Pressure to 65,000 psi > O-Ring Check Valves - Pressure to 65,000 psi > Email Page Email Page In Reference To : Comparison : Item # 65OC4H, 1/4" O-Ring Check ValveItem # 65OC6H, 3/8" O-Ring Check ValveItem # 65OC9H, 9/16" O-Ring Check Valve Your Information Send Email Cancel Required Fields * Recipient's Email * Use Semicolon (;) for up to 5 addresses. Your Email * Your Name Send copy to self Comments reCAPTCHA E-mail addresses are used for this mailing request only and are not saved or used for any other purposes. For security purposes, your IP address will be included in the E-mail. Send Email Cancel