Anyone remember the model number for the PS2 slim multitap?

My coworkers and I are talking about doing a retro game night in the office after work. I have a bunch of 4 player games we might play. Issue is my multitap only works for the fat PS2 so I need one and a couple controllers for my Slim but before I buy anything I need to get the right stuff They changed it for the Slim and mine doesn't plug in. Normally, I'd use my fat multitap in my fat PS2, but seeing as the laser is dead and my fat PS2 is now a piece of wall decoration, I need to buy a new one