102C/108C AND 108EXP SPRINGS FREQUENTLY USED.Color:Red - Spring Dia.:2-1/16"- Outside Spring Height:3-1/4"Wire Dia:.207 - # of coils: 5-3/8 Lbs Tension when compressedto height of: 1-1/8": 254 - 2-3/8": 92 - Rate of Tensionincrease per additional inch of Compression: 130.Actual tensions of springs vary from poundages and rateslisted herein which are only COMET spring tension objectives.Certified spring tensions would cause springs to besignificantly more expensive. Industry standards for springspermit an initial variance of +/- 10%. To "pre-load" thesesprings for greater initial tension, up to 3 spring shims(part # 203849) may be used with most of them. "Bottoming out"of a spring coil upon coil even once will hasten itsdeterioration so avoid using 3 shims if the "bottoming out"condition should result. Most popular models of springs usedon the market.