noun which may take the genitive case particle 'no'
domestic; made domestically
Used to describe products manufactured within the country, often in contrast to imported goods.
この車は国内製です。
This car is domestically manufactured.
国内製の部品を使っています。
We use domestically produced parts.
輸入品 means 'imported goods', the direct opposite of 国内製.
Compound of 国内 (domestic, within the country) and 製 (made, manufactured).