<apex:component >
<apex:attribute name="value" description="binding value for the component." type="String" required="true"/>
<apex:inputText value="{!value}" size="4"/>
</apex:component>


<apex:page controller="RequestWizard_Controller" action="{!init}">
...
    <apex:pageBlockTable value="{!SearchResults}" var="sr" width="100%" rendered="{!NOT(ISNULL(SearchResults))}">
        <apex:column ><c:numScroll value="{!sr.quantity}" ></apex:column> 
        <apex:column headerValue="UOM" value="{!sr.catalogItem.Unit_of_Measure__c}"/>
        <apex:column headerValue="Code" value="{!sr.catalogItem.Name}"/>
        <apex:column headerValue="Name" value="{!sr.catalogItem.Catalog_Item_Name__c}"/>
        <apex:column headerValue="Supplier" value="{!sr.catalogItem.Catalog__r.Fulfillment_Supplier__c}"/>
        <apex:column headerValue="Catalog" value="{!sr.catalogItem.Catalog__r.Name}"/>
        <apex:column headerValue="Limit" value="{!sr.catalogItem.Quantity_Limit_Max__c}"/>
    </apex:pageBlockTable> 
...

</apex:page>