In number of leaves it says 4(3/1). What does that mean? ()

1995 - 2005 Blazer, Jimmy, Envoy, Bravada rear leaf spring, 4(3/1) leaves, 1400 lbs capacity

Spring Capacity = 1400 Pounds
Width = 2-1/2"
# of Leaves = 4(3/1)
Measures (A/B) = 24-1/2" x 27-1/2"
Pack Thickness = 1-5/8"
Bushings Included
Sold Per Side - Order Quantity 2 for a pair
EXCLUDES S-10 PICKUP / S-15 PICKUP

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1995 - 2004 GM S10, S15 rear leaf spring, 4(3/1) leaves, 1350 lbs capacity

Spring Capacity = 1350 Pounds
Width = 2-1/2"
# of Leaves = 4(3/1)
Measures (A/B) = 26" x 28"
Pack Thickness (D) = 1-5/8"
Bushings Included
Sold Per Side - Order Quantity 2 for a pair
EXCLUDES S-10/S-15 BLAZER, JIMMY, BRAVADA

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1995 - 2004 GM S10, S15 heavy duty rear leaf spring, 4(3/1) leaves, 1650 lbs capacity

Spring Capacity = 1650 Pounds
Width = 2-1/2"
# of Leaves = 4(3/1)
Measures (A/B) = 26" x 28"
Pack Thickness (D) = 1-3/4"
Bushings Included
Sold Per Side - Order Quantity 2 for a pair
EXCLUDES BLAZER, JIMMY, BRAVADA

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1996 - 2025 GM G1500 / G2500 Savanna / Express Van rear leaf spring, 2240 lbs capacity, 4(3/1) leaves

Spring Capacity = 2240 Pounds
Width = 2-1/2"
# of Leaves = 4(3/1)
Measures (A/B) = 30" x 30"
Pack Thickness (D) = 2-1/2"
Bushings Included
Sold Per Side - Order Quantity 2 for a pair

5160 Steel - Heat Treated and Shot Peened
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1995 - 2005 Astro / Safari rear leaf spring, 1410 lbs capacity, 4(3/1) leaf

Spring Capacity = 1410 Pounds
Width = 2-1/2"
# of Leaves = 4(3/1)
Measures (A/B) = 26" x 28"
Pack Thickness = 1-9/16"
Bushings Included
Sold Per Side - Order Quantity 2 for a pair
Front Spring Eye and Upper Shackle Eye uses 9/16 x 6 Bolt
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