These weight compatible with Select Mallet 1, Newport M1 putter. Set(x2) of 5g, 10g, 15g, 20g, 25g, 30g, 35g, 40g putter weights. These don't fit newport golo and 2018 squarback series, 2019 squarback, 2019 squarback 1.5, 2020 squarback 2, 2020 Fastback 1.5.
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