Vola products and Hastings products are known for being robust and affordable options for parts and equipment. The Vola shower cartridge is made from high-quality material, and once you have it installed, you will be able to tell the difference. Vola faucet parts are another option if you want to replace a leaking and worn out valve. You want to replace the parts with quality products, and both Hastings and Vola fill this need. They are a go-to for plumbers, contractors and construction workers who want quality at an affordable price.