These Mishimoto fittings are a pair of M20x1.5 to 1/2-inch push-on hose barb adapters in CNC-machined 6061 aluminum with a black anodized finish, intended for use with Mishimoto's Universal Baffled Parallel Port Catch Can. The threaded end seals with a Viton O-ring for leak resistance. The listing notes the fittings adapt M20x1.5 to 1/2" CCV/PCV hoses and are covered by Mishimoto's Lifetime Warranty.
Mishimoto 2pcs. M20x1.5 1/2in Aluminum Catch Can Fittings - Black