Set(x2) of 5g, 10g, 15g, 20g, 25g, 30g, 35g, 40g putter weights. Custom Weights Material: 5g, 10g,15g,20g Stainless Steel, 25g,30g, 35g, 40g Tungsten steel. CX-02 putter. Shaft Adapter Sleeves. (Note: Included weights will NOT fit 2008 Studio Select Fastback 1 and Squareback 1; 2014 Select Squareback, Fastback, Roundback; Newport select M1 / M2 series ; California Fastback and 2018 Select Fastback putters.).