D60 Norton Springs for Buescher Saxes The first two digits of the style number indicates the music wire gauge. The second two digits indicate the length in millimeters. This information should help you determine what springs you need. The style numbers available are the longest length of each gauge so you can cut them to length. D60 Sizes: 0830, 1240, 1650, 2065, 2485The first two numbers are the diameter in wire gauge. The second two numbers are the length in millimeters. #08=.024 wire We carry size 0830, which is 30mm long #12=.028 wire We carry size 1240, which is 40mm long #16=.036 wire We carry size 1650, which is 50mm long #20=.046 wire We carry size 2065, which is 65mm long #24=.054 wire We carry size 2485, which is 85mm long~All Norton springs are a American 3-48 thread~ You can make the hole in the D60B Norton Spring Bushings. With these machine solid brass bushings you can install any size spring you want with any type material (blue, bronze, nickel or stainless) with any usable diameter YOU want...Just drill .024 pilot hole larger, if necessary.