GroStar GS4-E replacement pH/EC combo electrode

Returns: 30 days refund/replacement You can return any item within 30 days of delivery for a full refund or replacement, as long as it's unused and in its original packaging. Some products may be subject to restocking fees—see our return policy for full details.

Payment: Secure Transaction All payments are handled via industry-standard encryption and fraud protection. Your card details are never stored by us, and you’re covered by buyer-protection policies for a worry-free checkout.