Model No. C-500 thru C-582: 6-pieces per bag. Model No. C-600 thru C-680: 4-pieces per bag. Model No. C-690 thru C-792: 2-pieces per bag. Model No. C-818 thru C-858: 2-pieces per bag. All other compression springs are 1-piece per bag. Features Type - Compression Spring Length - 1-1/4 in. 0.04 in. Wire Diameter 0.61 in. Solid Height 10.6 lbs. Maximum Safe Load Polybag. 4 Pack Size - 5/16 in. OD Pack of 5 Dimension - 0.27 x 2 x 4.5 in. Item Weight - 0.02 lbs. Designed for use with a variety of household and professional applications These Handyman Compression Springs by Prime-Line Products are constructed of durable spring steel, and they come finished in a beautiful, corrosive-resistant, nickel-plated finish. Compression springs like these are used for a variety of household and professional applications, and they feature a strong spring rate. These springs are easy to install and are used by many. The outside diameters, lengths and gauge thicknesses vary between each of these springs, while their dependability does not. Use these springs for repairs around the house, in the office, vehicle, garage and in many other applications.