If affordability is your biggest concern, our JMC Low Cost Sampler stays within budget while maintaining a better than average build quality - a real bargin for the occasional soil sampler!
This extension lets you sample 3 feet deeper than the length of your sampling tube. (6 feet with a 3 foot tube) If you want to sample deeper than that you will need to purchase one or more JMC ESP Regular Extensions in addition to this extension.