Your search for "SPARK PLUGS" revealed the following:
316 Stainless Steel Plug for 1/4 in. Swagelok Tube Fitting
Rp 122.000,00
Vendor: APSS Store
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316 Stainless Steel Plug for 3/8 in. Swagelok Tube Fitting
Rp 137.000,00
Vendor: APSS Store
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