SHIMANO Yellow Hydraulic pad Spacer ?

Hi All
Looking at bleeding a set of Shimano M535 brakes and all the guides recommend using a spacer with the brake pads removed.
I do not have a spacer, what else can i use ? I do not want any oil to get on the pads.
Cheers
Looking at bleeding a set of Shimano M535 brakes and all the guides recommend using a spacer with the brake pads removed.
I do not have a spacer, what else can i use ? I do not want any oil to get on the pads.
Cheers
Specialized Epic FSR Carbon Comp
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Posts
Parktools :?:SheldonBrown
Giant Trance X2
Genesis High Latitude 2x10
Planet X n2a
Genesis Core 20
+ some other bikes.
I would be very careful doing this. The pistons are sometimes made out of ceramic and can chip very easily you shouldnt be putting anything metal in there. I have used a piece of 10mm (3/8th) chipboard cut down to fit when I couldnt find the bleed block.
Easty commuter
Tripster AT
Giant Trance X2
Genesis High Latitude 2x10
Planet X n2a
Genesis Core 20