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Here is the tutorial.
Step 1
Top plane>>sketch.
Step 2
Draw this profile.
Step 3
Extrude it by 15mm.
Step 4
Top face>>sketch.
Step 5
Draw a circle of 40mm dia.
Step 6
Extrude it by 30mm.
Step 7
Top face>>sketch.
Step 8
Draw a circle of 28mm dia.
Step 9
Draw two circles of 16mm concentric to the edges.
Step 10
Extude cut >> Through All.
Step 11
And we have the Gland.