can these be used in the oven? probably 300 degree max for oven sterilization

I've never used them in the oven. But probably

Can you just drill a hole in a wide mouth jar lid smaller than the diameter and cram it in?

Yes, you can operate it, this hole needs to be about the same diameter

Sucohans 100 Pcs 13mm Mushrooms Self Healing Injection Ports Rubber

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18105CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧫 Seal, Inject, Repeat — The Ultimate Sterile Solution for Cultivation Pros!

VERSATILE APPLICATION - Ideal for liquid cultures, supplemented substrates, and grain master jars—boost your cultivation game.
SELF HEALING RUBBER TECH - Innovative butyl rubber material reseals after each injection, maintaining sterile conditions effortlessly.
HEAT RESISTANT DURABILITY - Withstands steam sterilization without degradation, perfect for repeated lab or home culture use.
BULK PACK FOR CONTINUOUS USE - 100-piece set designed for professionals and enthusiasts who demand reliability and volume.
PRECISION FIT FOR MASON JARS - Seals 7mm or 1/4 inch openings flawlessly, ensuring contamination-free injections every time.

The SUCOHANS 100 Pcs 13mm Mushrooms Self Healing Injection Ports are premium butyl rubber stoppers designed to fit 7mm or 1/4 inch mason jar openings. Featuring self-healing technology, these injection ports maintain sterile conditions by resealing after each use. Their excellent heat stability makes them ideal for steam sterilization, supporting applications in liquid culture, supplemented substrates, and grain master jars. This bulk pack is perfect for professionals and hobbyists seeking reliable, reusable sealing solutions.

Specifications

ASIN	B07FJTZSVL
Best Sellers Rank	#70,618 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #49 in Lab Rubber Stoppers
Customer Reviews	4.7 4.7 out of 5 stars (1,138)
Date First Available	July 12, 2018
Item Weight	1.44 ounces
Item model number	8541898690
Manufacturer	SUCOHANS
Product Dimensions	1.61 x 0.79 x 0.79 inches

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