Fit Select Flowback 5. fit Select Flowback 5.5. fit FUTURA series. Feature: Set(x2) of 5g, 10g, 15g, 20g, 25g, 30g, 35g, 40g putter weights. fit Newport series. fit special select newport. (Note: Included weights will NOT fit 2008 Studio Select Fastback 1 and Squareback 1; 2014 Select Squareback, Fastback, Roundback; 2016 Newport Mallet 1; California Fastback and 2018 Select Fastback putters.).