Bộ chuyển đổi giảm cấp (Reducing adapter) cho ống nước

Reducing adapter from 40mm to 3/8, 1/2, 5/8, 3/4, 1

Reducing adapter from 32mm to 3/8, 1/2, 5/8, 3/4, 1

Use Petg or other more durable filament

For better strength, give more perimeters - 4-5, and for adhesion to the printing plate, use a collar

Use a 32-32mm or 40-40mm coupling with additional pipe to connect

40mm reduction

32mm reduction