Warranties often specify a product's expected life and offer to replace, repair, or reimburse the consumer for defective parts or workmanship. The business that makes the product or provides the service can then use the written warranty to promote customer acceptance and increase sales. The warranties can be insured as an alternative to covering future warranty claims. Customers are often more willing to purchase a product or service that has a warranty backed by insurance. Common examples of products or services that have written warranties include household appliances, solar heating equipment, auto rust-proofing services, auto accessories, auto muffler and transmission services, burglar alarms, and camera equipment. The insured's liability for the warranty can be covered through guaranty bonds, contractual liability coverage, or commercial inland marine coverage forms.