This is a set of 5 unused vintage style split band hose clamps.  When fully opened, clamps have an inner diameter of 1 inch; when fully tightened, inner diameter is approx. 3/4 in.  The screws are cheese head slotted type and are approx. 1-1/8 in. long (not including head); the clamp band width is 1/2 inch.  All clamps are of the same style & manufacture; mfgs. mark on them is:  A41/4

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