Reference for Kelim 5:3
עֲטֶרֶת כִּירָה, טְהוֹרָה. טִירַת הַתַּנּוּר, בִּזְמַן שֶׁהִיא גְבוֹהָה אַרְבָּעָה טְפָחִים, מִטַּמְּאָה בְמַגָּע וּבַאֲוִיר. פְּחוּתָה מִכָּאן, טְהוֹרָה. אִם חִבְּרָהּ לוֹ, אֲפִלּוּ עַל שָׁלֹשׁ אֲבָנִים טְמֵאָה. בֵּית הַפַּךְ וּבֵית הַתְּבָלִין וּבֵית הַנֵּר שֶׁבַּכִּירָה, מִטַּמְּאִין בְּמַגָּע וְאֵינָן מִטַּמְּאִין בַּאֲוִיר, דִּבְרֵי רַבִּי מֵאִיר. רַבִּי יִשְׁמָעֵאל מְטַהֵר:
The rim of a stove is pure. The surrounding brickwork of an oven, when it is [at least] four <em>tefachim</em> tall, becomes impure through [an impure object's] touch or through [the object] in its air[space]. Less than this, it is pure. If it is attached [to the oven], even if on three stones, it is impure. The holder for an oil jug, the holder for a spicebox or the holder of a light on a stove, become impure through [an impure object's] contact [with the stove] but are not impure through its air[space]. These are the words of Rabbi Meir. Rabbi Yishmael says they are pure.