Rising Dragon Filter Cartridge Adaptor - Spas Direct etc

Rising Dragon Cartridge Mount Assembly - 1.5" Acme thread x 2" socket. Often found in Chinese-made spas too use with these course-threaded filters.

Black insert twist locks into place. Sometimes comes out when removing the filter. Only comes as the set. You can discard the other parts if necessary. 

95mm OD with 72mm hole size required

Used with these filters: OEM Universal, Spas Direct Type B, mBL25, mD15249-1b, mGX45, mLR90-k, mLR100-k, mSG50, mSG92, 
mSG100-k, mSIE, mWY45