Check the listing for details. 2-3/16" to 3-1/8" Murray Dual Bead Super Sealing Hose Clamp DB44SS. Color: Silver, Condition: New. Listed at 4.85 USD. Murray Dual Bead Super Sealing Clamp SAE Type “F”– For air to air and coolant applications. The inner shield provides superb sealing characteristics and is safe for all soft hoses. It can also be found in the marine, agriculture, construction and off-highway markets.The unique Dual Bead Shield provides superior sealing pressure via its two raised ribs and flanged edges to eliminate damage to the hose when tightened. The unique inner liner also concentrates band-sealing pressure, increasing performance up to 30% compared to standard smooth liners. Flanged edges protect soft hose compounds.Electropolishing improves weld strength, which leads to improved performance, improved corrosion resistance, and enhances appearance with a more even finish.Band Material: 300 Series StainlessHousing Material: 300 Series StainlessShield Material: 300 Series StainlessScrew Material: 400 Series StainlessRated Ultimate Torque: SS Screw 60in.lbs. min. (6.8Nm)Recommended Installation Torque: SS Screw 35-45in.lbs. (4.0 - 5.1Nm)Dual Bead Super Sealing Clamps are offered in several sizes. See our other listings for sizes available.This listing is for the DB44SS SAE Diameter Decimal 2.19" - 3.13"; SAE Inches 2-3/16" to 3-1/8"; Millimeters 42.9mm to 66.7mm. The outside band is stamped with a slightly different size range because it doesn't include the DB shield. This shield effectively reduces the inside diameter of the clamp. The listed sizes are correct. Price is per clamp but there are no additional shipping charges for more than one clamp in the same size. Additional clamps of different sizes add one discounted shipping charge per size if on the same order. Tech Tips From Colonel Red Racing:Silicone Hose Outer Diameter Sizing:Use this chart to determine which Murray clamp to use on your silicone turbo hose connections. For example a 2 1/2" intercooler pipe uses a 2 1/2" silicone ID connector, but since the silicone outer diameter is larger you need a larger than 2 1/2" clamp. Silicone hoses are NOT all the same thickness so you can measure the outer diameter or circumference of yours and look it up on the chart to be sure you get the right size.We have included typical clamp sizes for these hoses but yours may be different!The TSSxx are Constant Tension, the DBxx are Dual Bead. 1.75” Hose = 44mm ID = 2.07”OD = 53mm OD = 6.5” Circumference = 166mm Circumference.TSS28; DB32, DB28 can be used but is on the edge. 2.0” Hose = 51mm ID = 2.32”OD = 59mm OD = 7.29” Circumference = 185mm CircumferenceTSS32; DB36 2.25” Hose = 57mm ID = 2.57”OD = 66mm OD = 8.07” Circumference = 207mm CircumferenceTSS36; DB40. DB36 may work but will be on the minimal edge size. 2.50” Hose = 63.5mm ID = 2.82”OD = 72mm OD = 8.85” Circumference = 226mm CircumferenceTSS36; DB44 2.75” Hose = 70mm ID = 3.07”OD = 78mm OD = 9.65” Circumference = 245mm CircumferenceTSS44; DB48 3.0” Hose = 76mm ID = 3.32”OD = 85mm OD = 10.43” Circumference = 267mm CircumferenceTSS48; DB56 3.13” Hose = 80mm ID = 3.45”OD = 88mm OD = 10.84” Circumference = 276mm CircumferenceTSS48; DB56 3.25” Hose = 83mm ID = 3.57”OD = 91mm OD = 11.22” Circumference = 286mm CircumferenceDB56. We don't have a TSS constant tension clamp for this size. Tech Tips from Murray Clamps:Worm Drive Clamp Size:Generally speaking... the Open Diameter size... the diameter size increment... and the Close Diameters of most worm drive clamps in common use today is dictated by industry standard (SAE J1508, DIN 3017).A. When selecting a clamp for use on coolant hose or similar... it is recommended that the clamp be selected based upon the full Open diameter of the clamp. Sizing the Open diameter of the clamp to the hose O.D. will minimize the amount of band tail that will protrude from the clamp after it has been installed.Resist using a much larger clamp size. The use of a larger clamp size will result in a clamp installation that has a much longer band tail protruding. This could present a snag/cut hazard in some locations. If the tail end is to be trimmed short... then the clamp should be marked... removed... cut short... corners chamfered and edges deburred before final installation. Do not simply cut off the excess tail as the cut edge will remain sharp and hazardous.An alternate solution for handling a long tail condition is to simply curl it under with a pair of needle nose pliers.The band material is ductile enough to handle this type of bending. The downside here is when the clamp needs to be removed... the tail will present resistance unless uncurled.B. It is okay to combine multiple small diameter clamps to make a larger one. For example: two(2) 4" clamps joined together will yield an 8" diameter clamp assembly. Sometimes there is an advantage having multiple tightening points when working with large diameters... not just from the tightening access perspective... but multiple tightening points on large diameters produces more uniform clamping pressure around the connection.Screw Lubrication:All Murray worm drive clamps are manufactured with a small amount of lubricant on the screw.For plated carbon steel screws the zinc plating serves as the lubricant... whereas all of the stainless screws utilize a supplemental (clear) wax compound.Regarding stainless screws... over time the wax compound may dry up or be driven off by in-service temperatures... or harsh environments. This may leave the clamp assembly in a totally dry or under-lubricated state. If this clamp were to be re-used as-is it might be found to be under-performing with regard to expected torque-tension characteristics.Most clamps can be restored to acceptable performance levels in the field by applying a small amount of lubricant...motorcycle chain wax... WD-40... or similar products have given good performance.R. FayMurray Chief EngineerManufacturer of Automotive, Industrial and Marine Clamp Products