Stainless stepped adaptor. O/D=63.5mm - I/D=48mm. L=105mm. Stepped Sleeves: Available in 1.75", 2", 2.5", 3", 3.5", 4" and 5" diameter. Aluminised or stainless steel. Dimensions are outside diameter. Ends are not flared or slotted. 4" and 5" stepped sleeves have one step. All other diameter sleeves have 2 steps.