What does SSBB stand for?

This is a factory Springfield Armory XD(M) 9mm Luger Magazine. This magazine features a 19 round capacity constructed from Stainless Steel. It features a polymer base plate and a polymer follower. The magazine is made to the same specifications and features as the magazine that came with your firearm. Specifications and Features: Springfield Armory XDM5019 9mm Luger 19 Rounds Factory Magazine Stainless steel body Polymer follower and base plate Fits: Springfield Armory XD(M) Full Size Models

The Ruger P-Series Magazine is a standard aftermarket replacement magazine for the Ruger P firearms. This magazine is designed to hold 15 rounds of 9mm Luger and is made of steel with a matte finish. This magazine is made to Ruger specifications and tolerances, using the same manufacturing and materials as the original equipment magazines, ensuring perfect fit and operation. Specifications and Features: Ruger 90233 9mm Luger 15 Rounds Steel body Polymer Follower Polymer Base Plate Stainless Finish Fits: Ruger P89/P93/P94/P95 and PC9 Carbines Note: This will only fit your P89 with a serial number of 304-70000 and above.