Rockford White Alloy Mainspring JA-550
$34.95
JA-550
Size 18, factory # 644, width in mm 2.9, strength in mm 0.22, length inches 22, end T
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Rockford White Alloy Mainspring JA-551
$34.95
JA-551
Size 16, factory # 822, width in mm 2.7, strength in mm 0.205, length inches 20-1/2, end T
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Rockford White Alloy Mainspring JA-552
$34.95
JA-552
Size 12, factory # 932, width in mm 2, strength in mm 0.172, length inches 18-3/4, end T
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Rockford White Alloy Mainspring JA-553
$34.95
JA-553
Size 0, factory # 1077, width in mm 1.7, strength in mm 0.14, length inches 13-3/4, end T
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