Review on Universal Diameter Performance Silicone Vacuum Replacement Parts by Reginald Ward

Wow! Silicone hoses of the highest quality. The variety of pipes and their length met expectations. If you make silicone vacuum lines, use these materials. Good value for money. Many Thanks. NOTE: For vacuum lines only. Not to be used as fuel or coolant hoses. UPDATE: Just an update for those making vacuum lines. The 12mm hose has a thinner relative wall thickness than other hoses (actually the same). Still good, but the largest tube in the set (12mm ID) will shrink in high vacuum situations. I used a large 12mm ID hose on my main engine manifold and brake booster (both straight, short lengths of about 6-8" each) and found that if the vacuum increased 18-20"/Hg, a hose would collapse . Well. It then returns to normal when the vacuum is removed, which can become a troubleshooting nightmare. I replaced those two hoses again with reinforced rubber hoses (like the heater hose). This tube set is STILL GREAT but I would advise avoiding the 12mm tube in your main vacuum. All other tubes (4mm, 6mm, 8mm) work fine without collapsing under vacuum. Hope that helps