SIlicone check Valve for D&S couplers.
For the larger type check valve see here

A carbonation or aeration diffusion stone. This can be used as a way to aerate your wort prior to fermentation, or to speed up carbonation of the finished beer.

The barb fits 1/4" (6.35mm) ID tubing.

An Oxygenation/Aeration Wand is an easy to use tool for adding oxygen to your wort to help ensure healthy yeast growth.

The wand kit includes the 60cm stainless steel 8mm OD wand and the 2 micron aeration stone screws into the end using an MFL thread so it can easily be removed for autoclave or dipped in acid solution. The kit also includes a stainless clamp and 2 meters of vinyl tubing.

Note: You will also need an oxygen cylinder and regulator which are not included.

Stone: 2 micron
Wand Length: approx. 650mm total
From: Kegland

An Oxygen Flow Meter with Duotight 8mm fittings - 0.1-1.5L/min.

This flow control device is designed to be used with an oxygen cylinder and regulator that can be purchased separately.

An Oxygen Regulator for Disposable Oxygen O2 Cylinders (M12 Thread).

Use for Oxygen only

A carbonation or aeration diffusion stone, 2.0 micron, with MFL thread. This can be used as a way to aerate your wort prior to fermentation, or to speed up carbonation of the finished beer.