Your search for "instruments" revealed the following:
Stainless Steel Swagelok Tube Fitting, Union Tee, 1/2 in. Tube OD
S$68.77
Vendor: APSS Store
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SS-600-3 – Stainless Steel Swagelok Tube Fitting Union Tee, 3/8 in. Tube OD, 316 SS
S$44.63
Vendor: APSS Store
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