Power Spring for Blue Flame Ultimate Pitching machine Replacement Power spring for both the Blue and Black Flame Pitching Machines This is just the spring Blue Flame Pitching Machine is also known as the Louisville Slugger Ultimate Pitching Machine The Blue Flame is also known as the UPM 45 Pitching Machine Replacement Power Spring for the UPM 45 pitching machine also known as the Blue Flame 45 and the Louisville Slugger Ultimate pitching machine. This is also the power spring for the Louisville Slugger Black Flame 55 pitching machine. Just the spring. The pitching machines will gradually throw slower over the season as the spring get tired. Springs should be replaced every year as they will wear out with use. This is the spring that powers the pitching machine.